Google Develops Touchless Wearable Technology

At Google's Advanced Technology and Projects group, or ATAP, Project Soli is the first of two projects led by legendary interaction designer Ivan Poupyrev that is trying to decouple the way we interact with our devices from touchscreens. It's a tiny radar, small enough to fit into a 1.5-inch smartwatch, that can understand the gestures your fingers make even though they never touch a screen.
"Project Soli is developing a new interaction sensor using radar technology. The sensor can track sub-millimeter motions at high speed and accuracy. It fits onto a chip, can be produced at scale and built into small devices and everyday objects. "