Apple sold 2.7m Apple TV devices in the first half of 2012

"Yesterday’s much-anticipated interview with Apple CEO Tim Cook at the All Things Digital conference in California contained no slips-ups or surprises, but confirmed that TV remains an area of ripe interest for the company.
[...]
He revealed that sales of the Apple TV device are on the up – 2.8m units were sold in 2011, and 2.7m were sold in the first six months of this year – with growth helped by the move to 1080p content and cloud delivery (and presumably the recent price drop)."

Source:  IP&TV News, 31st May 2012