Microsoft Research showed off the IllumiRoom Technology at CES 2013 together with Samsung. In the demonstration video, you can see that Microsoft really wanted future games to be really 3D with the combination of Kinect and Augment Reality.
In the demo, the game is no longer bounded by the TV screen. Instead, it projected outside the screen across the wall of the room making the game more realistic (or 3D). Not sure if this is the future of Xbox (as suspected by The Verge) or just another project that may not see the light. Check out the video now.