Control your PC with a wave of your hand

The PC has been around for three and a half decades, but the way we interact with them hasn't evolved much: We type, we point and click, and, increasingly, we touch.

A company called Leap Motion wants to make computing decidedly more 21st-century. By adding hand motions and gestures to the mix, Leap Motion believes it can help transform computing from a two-dimensional world to a 3-D one.

The $80 Leap Motion Controller is a small plastic and aluminum rectangle that houses a pair of 3-D camera sensors. The controller tracks your hands in space with pinpoint accuracy: It can detect movement of 1/100 of a millimeter. It works with Windows PCs and Macs, and is currently supported by more than 80 apps.

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