Everything about Kinect on PC is a bit underwhelming. I really don't want to wave at the thing a few inches from me, but I'd love to have it be able to track my eyeballs and be able to click or run macros via lifting fingers, blinking, or moving my jaw. We may be a year or two away from some really exotic UIs.
Kinect for media center looks pretty promising. I have a windows mediapc running windows 7 and am tempted to buy the PC version of the kinect just to control everything via gestures.