Sony's energy saving TVs watch you while you sleep http://www.guardian.co.uk/environment/2010/may/14/sony-energy-saving-tvs-watch-sleep

The next time you fall asleep in front of the TV, someone, or rather something, could be watching you – and all in the name of saving energy.Sony last year launched a new addition to its Bravia range of TVs, which features facial recognition technology similar to that found in the electronics giants' most advanced cameras. As a result, the TV is able to "watch" you and can turn the picture off if you nod off in front of Match of the Day, saving the energy used by the backlight.