What's more, Kinect will play a key role in the next Xbox's TV services. Using the motion sensor and camera, the system will be able to detect multiple users simultaneously and will intelligently control playback based on their movement. For example, if a viewer turns their head away from the TV, the Xbox will supposedly pause the video on-screen — not unlike the Smart Pause found on the upcoming Samsung Galaxy S4.
This would only work if your TV supports HDMI that does that thingy that it can chat two ways.... (perhaps someone can remind me of the correct term...)