When Navneet Dalal listens to music on his computer, he doesn't want any keyboard taps or mouse-button clicks to interrupt the experience. He'd rather just hold up an open palm to play or pause the tunes.
Dalal is cofounder of Flutter, a startup that offers simple software that lets users control ordinary computer apps with such simple gestures. Flutter emerges as gesture controls are becoming increasingly popular on consumer devices: Microsoft's Kinect motion sensor brought it to the Xbox, and the company now sells a Kinect for Windows setup that encourages users to build applications using the technology. Samsung, meanwhile, has added gesture-control technology to some of its TVs.
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