I've written a presentation finalizing (given current knowledge) the Kinect peripheral I describe in my Project Natal Preliminary Analysis. It also describes the peripheral's many advantages.
I strongly recommend opening the presentation in another window so you can access my "speaker notes" and follow along with them, but if you want to see a "preview" version of it, here it is:
"The human body is a great joystick." -- unknown
Motion capture technology is frequently used by game developers to capture human motion for their characters.
"Full Motion" is where motion capture is used on the player for the purpose of creating a 3D model that mimics the player's actions in real time.