So many Kinect hacks have teased a "Minority Report" style interface. Picked at its edges, approached it with half steps. This clip shows it's not only possible with Microsoft's new camera, it's possible right now.
Using Kinect drivers for Linux, some kids from the Robot Locomotion Group and Learning Intelligent Systems teams at MIT have come up with a system that has Kinect detecting all 10 of your fingers, along with your palms, and using them to allow interaction with a display.
The presentation may not be at the same level as the classic science fiction flick, but the level of interactivity (and potential for more) looks to be pretty damn close!