Microsoft's Kinect sensor (released November 4 for the Xbox 360 system) is a different beast from the Wii and PlayStation Move. Employing a camera to create controller-free gaming, the Kinect sensor puts you into the game like none of its competitors. There are a few kinks in the system, but the overall product goes a long way toward making me a believer.
While Wii simply picks up the controller's movements, your entire body and play space are utilized for Kinect games. For example, if a ball is flying at your left side, stepping to the right will dodge it, or if a hurdle is in your running path, you can physically jump over it. And unlike the Wii-too approach of PlayStation Move, Kinect is a genuine step forward for motion-controlled gaming.