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