Here is a more concrete - and amazing - application of the Minority Report fantasy that the Kinect enables.
A group at MIT has rigged up the Kinect to act as a controller for a web browser. Sort of like a touch screen, minus the touching. This video had me gasping and uttering expletives.
As the original article says,
This is clearly one controller that is not going to stay forever tethered to an Xbox 360, as Microsoft may have originally intended it to. We expect to see even more exciting ways to use a Kinect to control all kinds of things in the future.
Mayble touchless typing is around the corner.