Not really surprising after his last project wherehe already explained the IR sensor of the Wii remote. You can also buy those Track IRs for the PC for some time already although they're mostly used to look around in simulations as far as I'm aware. Oh and they're more expensive. What he shows here looks pretty nice but I cannot see the use of this yet. Yes, you get to look at the TV as some sort of window and it looks cool etc. but what practical use would that have in games? Except maybe controlling the game with your head instead of your hand.