The Android based handsets employ eyeSight‘s gesture recognition technology, which is a software-only solution that works with even the low resolution cameras typically found on the front of smartphones. It’s capable of detecting simpler gestures, like waves and taps, and isn’t tripped up by motion or poor lighting conditions. I suspect the dark of night could be a problem.
Out of the gate the functionality looks like it will be limited to placing and answering calls, as well as controlling your music. So it seems like a feature better suited for use when driving. But there’s no reason a software update down the line couldn’t increase its functionality and make it a more appealing feature. [All Things D via Phandroid]