An FPS with your finger
In case you haven't heard, there's a peripheral on the PC called the Leap Motion, and it's essentially billed as a more accurate Kinect. Games have slowly been trickling out for it, one of which is the upcoming Blue Estate -- a first-person shooter designed to work with finger gestures.
I just recently acquired a Leap Motion, and I've been fairly impressed with the accuracy of it. Whenever this drops I'll be checking it out.