As a designer, you've gotta love the Wild West period of a new technology, where everybody's still figuring out the form factor with brazen experimentation. Cell phones, particularly the ones out of Finland and Japan, were fun to look at in the '90s; those days are over now that most are content with aping a certain famous black rectangle.
Cell phone experimentation may be done for now, but a variety of companies are still casting about for form factors for the nascent technology of gesture control interfaces. Leap Motion's got a silver rectangle, the PredictGaze guys are going with what's already built into your device, and now Microsoft is advancing beyond the Kinect with this experimental wrist-mounted device called Digits. (It's clunky-looking now, but let's not forget that cell phones in the '80s came attached to briefcases.) Take a look at what it can do:
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