235m TVs were sold in 2014

"According to the worldwide TV market report from Futuresource Consulting, 4K TV shipments are expected to grow by 147 per cent in 2015, despite an overall 2 per cent fall in TV sales.
Global TV sales rose in 2014 by 3 per cent to reach 235 million units, with trade value up to $94 billion. The TV market landscape remains varied across the globe, with some regions, such as Latin America, experiencing significant growth, caused by the Brazilian World Cup and the start of analogue switch-offs in the region, which are set to continue beyond the forecast period. Europe, too, enjoyed 3 per cent growth. APAC, however, saw declines during 2014 but remained the largest region for TV demand, accounting for 37 per cent of shipments. With saturation in many countries within the region relatively low, Futuresource expects growth to return in the coming years."

Source:  Advanced Television, 30th Jly 2015

Sky has 5.7m connected TV homes in the UK

"Sky connected three million Sky+HD boxes to broadband between June 2013 and 2014, more than doubling the base of connected homes to 5.7 million.
This means more than half of all Sky TV subscribers can now stream content over the web to their main television set.
"Our focus in the last 12 months has been on driving take-up and usage of connected TV services to enable more customers to benefit from a much richer entertainment experience," Sky stated.
"The investment we have made to put Sky at the heart of the ‘connected home’ has delivered results."
Sky said the rapid roll-out of connected TV has driven a threefold increase in on-demand viewing.
The service provider claimed its expanded Box Sets offering has proved "particularly popular".
"Box Set usage grew rapidly throughout the year to hit 86 million downloads in Q4 2014, a fourfold increase year-on-year," Sky noted.
"With more than 250 Box Sets now available on Sky and more of the latest titles than anyone else in the market, titles like '24' and 'Grey’s Anatomy' achieved over ten million downloads each.""

Source:  USwitch, 28th July 2014

Also - 180 'AdSmart' connected TV advertisers

36,000 people watched the Queen's Christmas Message in 3D on the BBC HD Channel

"The Queen's annual Christmas message had 8.7 million viewers across BBC1, ITV1 and Sky1 at 3pm, the vast majority of them (6.3m) watching on BBC1.
It was the first of the Queen's festive addresses to be broadcast in 3D, and 36,000 viewers watched it with the extra dimension on the BBC's HD channel. Figures for Sky's 3D broadcast of the 10-minute programme, produced by Sky News, were not yet available."

Source:  The Guardian, 26th December 2012

Take up of HDTV in 2012

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Source:  Research by Ofcom, conducted in October 2012, reported in The Ofcom International Communications Report, December 2012

Ownership & personal use of media devices in 2012

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Source:  Research by Ofcom, conducted in September 2012, reported in The Ofcom International Communications Report, December 2012

Device ownership in 2011

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Source:  accenture - Always On, Always Connected report, January 2012
Note - markets in the survey are:  Brazil, China, France, Germany, India, Japan, Russia, South Africa, Sweden, US

Ownership & usage of mobile & consumer electronics devices in Europe, US & Australia

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Source:  Ofcom Consumer Research, October 2011.  Taken from the Ofcom International Communications Market Report, December 2011
Lots more data and charts in the full report here

The median size of a TV reviewed on CNet

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The data shows that the median size of a TV reviewed on CNET grew from 34 inches in 2002 to 46 inches in 2009.
Source:  Blog post on Flowing Data, 29th September 2009
Note - this is more 'interesting' than 'scientific', but it seems to illustrate that the TVs in people's homes are getting bigger, which rings true for me.
From the blog post:
"The numbers come from the past 745 dated CNet television reviews.  While reviews aren't a direct indicator of what televisions people buy, they do show what's on the market"

As many people in the UK plan to buy a tablet as plan to buy an HD TV in the next year

"The relationship between watching television and shopping online will get even closer in 2011, according to a Deloitte report, with fieldwork done by GfK, on behalf of the MediaGuardian Edinburgh International Television Festival, which takes place between 26–28 August 2011. Deloitte and GfK’s survey of 4,000 UK citizens found that as many consumers plan to buy a tablet computer as a new HD television in the year ahead, 13 per cent.
The tendency to watch television while browsing the Web has grown in popularity. Over half of the survey’s respondents now browse the Web while watching television. Only 22% never do so. In 2010, 39 per cent of all respondents never used the Web and television concurrently and, of those who did, about half did so only occasionally."

Source:  Data from Deloitte & GfK, published in a press release, 22nd August 2011

Key Ofcom stats for the UK

"Internet
Number of fixed residential broadband connections in the UK - 18.0 million (end 2010).
Proportion of adults with broadband in the UK (fixed + mobile) - 74% (Q1 2011)
Proportion of adults with mobile broadband in the UK - 17% (Q1 2011)
Proportion of adults with a social networking profile - 48% (Q1 2011)
Proportion of people who use their mobile to access the internet -  32% (Q1 2011)
Number of mobile broadband (Dongles/PC datacard) subscriptions - 4.8 million (end 2010)
Landline/mobile phones
Number of residential fixed landlines in the UK - 23.7 million (end 2010)
Number of fixed landlines in the UK, including ISDN channels - 33.4 million (end 2010)
Proportion of adults who personally own/use a mobile phone in the UK - 91% (Q1 2011)
Proportion of adults who live in a home that has a mobile phone but no landline phone in the UK - 15% (Q1 2011)
How many PAYG mobile subscriptions in the UK ? - 51% (Q1 2011)
Number of text messages sent per mobile subscription per month - 133 (in 2010)
Number of 3G mobile subscriptions in the UK - 33.1 million (end 2010)
Digital television
Proportion of UK homes with digital TV 93% (Q1 2011)
Number of TVs in the UK 60m (end 2010)
Number of HD TVs in the UK - 24m (Q1 2010)
Number of minutes of TV people aged 4+ watch each day - 242 (average in 2010)
Number of UK homes with Freeview on any set - 74% (Q1 2011)
Proportion of UK homes with Freeview on their main set - 38% (Q1 2011)
Digital radio
Proportion of households with access to a DAB Digital Radio - 37% (Q1 2011)
Proportion of listener hours through a digital platform (DAB, online, DTV) - 26.5% (Q1 2011)
Number of digital radio stations - 216 (end 2009)
Number of local radio stations (excluding community stations) - 344 (July2011)
Number of national radio stations - 21 (July 2011)"
Source:  Ofcom's latest facts and figures on the UK, retrieved 4th August 2011

22% of US homes own an HDTV with integrated apps

"Over 60% of Internet-connected TV households use TV apps at least once per week, according to Scottsdale, Ariz.-based In-Stat. New wave TVs allow consumers to connect with Netflix, YouTube, Facebook, and more.
"As expected, Netflix and YouTube currently dominate the TV application space," says Keith Nissen, research director at In-Stat. "But as Netflix competitors become more numerous and as applications are optimized for the big screen, TV apps will become part of the mainstream TV viewing experience."
Right now, In-Stat says 22% of U.S. TV households already own an HDTV with integrated TV apps. Connected TVs with integrated TV applications will grow by an average 36% over the next five years."

Source:  Data from In-Stat, reported by MediaPost, 26th July 2011