This is very neat looking and at some point I may give this a go to control Spotify. One concern I have though is with this running the LED light on camera is

This is very neat looking and at some point I may give this a go to control Spotify. One concern I have though is with this running the LED light on camera is always going to be active (which is fine) but I then won't know if some other (malicious) app is accessing my camera. Another thing to keep in mind is I am sure some form of this eventually makes it into MacOS. No way Apple acquired all those gesture patents without having some kind of plan for them.