Project Soli is a Google initiative that wants to make in-air, screen-less gestures to control technology a reality. In other words, the user should be able to control their devices through certain hand gestures, which are converted into workable commands by innovative little radar sensors. Google has reportedtly secured FCC approval for this form of hardware.
https://www.notebookcheck.net/Google-s-Project-Soli-secures-FCC-approval.391786.0.html