Google Soli prototype extends touch beyond the screen with tiny radar

Google has an interesting new project page up for Soli, which promises to use tiny radar chips, which are smaller than a quarter, to accurately detect nearby finger motion — and then translate that into useful input. Google imagines users one day turning an imaginary know to turn down the volume, sliding their thumb across their index finger to navigate a map, and other gestures to extend the usable input area beyond the confines of a device itself.

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