The video game geeks know it already as Project Natal, but it's been re-named Kinect and it's the hottest upcoming Video game technology. You can preorder a kinect set now for about $150 for the special motion tracking camera (EBGames is taking orders), plus you will need some new Kinect games.
The cool thing about Kinect is that it has no controller, just a camera that sits on top of the TV.
PS3 is doing something similar, but will use the standard Playstation Eye camera and add a lightsabre-like controlller so that you still have buttons to push and it should improve the camera's tracking... but back to Natal um, I mean, Kinect.
Here is what it looks like: