Improving the interface
Fact is, on iOS devices, there is no "mouse hover" state. This puts those of us who are web developers into a bit of a pickle, as we have to retranslate a "touch" on mobile into "mouseover" through the use of JavaScript.
If this motion sensing brought back mouseover, mouseout, hover, mousein states, it would seriously improve the interface for iOS. I have a feeling that the sensor would be intentionally "blind" (as the Kinect is) at distances that are not practical for these gestures. On iOS, the gesture would be just a few inches. On Apple TV, a number of feet.