Natal Now is Kinect

Kinect, formerly Project Natal, uses a camera for Xbox 360 that tracks a game player in three-dimensional space, tracking 48 points on a body and providing a more-realistic gaming input capability. The infrared camera improves the quality of input to a game program in somewhat the same way that a Wii controller does.

Think of tracking user response to a volleyball lob, for example.

What Is Xbox 360 Kinect?