Remember the cool gesture-based computer interface used by Tom Cruise in the movie Minority Report? Unless you're employed in a very specialized field (like futuristic crimefighter), you probably won't be using one at work anytime soon.
The main reasons relate to space. Picture the typical officeworker's cubicle, and add a huge display and an arm-spanning volume in which to move one's hands around. Now, imagine the opportunities for spilling coffee and bumping passers-by. There are also accessibility issues with an interface requiring two hands, and a full range of body motion.
Nevertheless, motion control has future for the majority. The Nintendo Wii continues to outsell the competition, and introduce new audiences to videogames, with its motion-sensing controllers. In addition, universities and companies are refining gesture-based interfaces for niche audiences. You don't need glowing fingertips to use interfaces like these:
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