I did a project once for a touchless interface using a Leap Motion (remember those?) for use in operating theatres. The software was a 3D viewer for MRI scans.

I did a project once for a touchless interface using a Leap Motion (remember those?) for use in operating theatres. The software was a 3D viewer for MRI scans. The surgeons attached to the project were excited, because currently they operated the software by telling the nurses how to rotate and zoom, which didn't work so great. In the end it ended up not working well enough (the Leap Motion would often give glitchy positioning data), but I believe it's the way forward.