Stand in front of a TV armed with a gesture technology camera, and you can turn on the set with a soft punch into the air.

站在配备有手势识别摄像头的电视机前，你可以握拳虚击以打开电视；可以晃动手腕换台；手掌向上扬调高音量。

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There is still some way to go before a "smart camera" can tell the difference between details such as a handshake and a punch, but Velastin believes they are not too far away.

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