Students from the University of Texas at Austin can't get enough gaming, not even with kinect. They created a virtual reality gaming setup with an eye-following projection screen! A pico-projector is is placed on a rotating base. As camera tracks the line of vision of the player, the projector is rotated accordingly. They tested it with a first-person shooter game, as well as a flight simulator, where the player controls the pitch and roll of an aircraft by moving their head. I do have some games in mind that this would be a perfect gadget!