Indeed, there are a number of uses for technology that let’s us control computers with hand gestures – among them, your typical game. But, the implications of this technology becoming mainstream include the final and eventual replacement of the mouse. Check this out:
There are certainly many barriers to this kind of thing becoming a standardiazed input, but Microsoft may be the company to do it. Imagine a future, if you will, a minor operation in both of your wrists to embed a small DIGIT sensor that can be used to control everything from tablets to the radio in your car, to realtime translation of sign language.