Windows 7 by default supports multi-gesture interaction, and when combined with Kinect motion sensing then it can reproduce amazing result of how you control the apps. its like using the long debuted Microsoft surface without any multi-touch LCD requirement. It supports multi-user and multi-gesture interaction which can be well suited for gaming as well as office and media applications. check Kinect being used with windows 7:
There are more photos of kinect usages and gesture detection @ Wolfgang gesture computing blog