There has been a lot of recent work with gesture based computing: Intel Real Sense, Google's Soli, Myo, Leap Motion

https://github.com/melling/ErgonomicNotes/blob/master/README...

Leap Motion made huge improvements a few weeks ago with their Orion SDK:

http://venturebeat.com/2016/03/04/leap-motions-hyper-accurat...

We must be close to actually getting something basic for our desktops.