Kinect is a new video game system that is fully controlled by bodily movements. It's vaguely similar to the Wii, but doesn't use a controller (and doesn't have the associated risk of banging up your living room if you lose your grip on the Wii wand during an aggressive tennis swing).

Kinect observes users through a video camera and recognizes gestures they make with different body parts, including hands, arms, legs, and general posture. The fitness program, for example, is fond of telling me to "do deeper squats," which it can do because it knows how my entire body is moving. Analyzing body movements in such detail far exceeds the Wii's capabilities, though it's still not going to put my trainer down at the gym out of work.