A 2015 proof-of-concept with Intel shows the potential power of touchless interaction in the age of COVID-19.
https://ideum.com/news/gesture-intera...
Our own history with gesture and voice recognition goes back more than five years. Most notably, we worked with Intel on a proof-of-concept interface that employed the premiere version of the RealSense motion recognition system and SDK. For this project, we used the RealSense SR300, a short-range recognition system.