Hand Gesture controls bother me. I see all these fancy implementations enabling hand gestures such as the Google ATAP project called Soli [1], but none of these replace haptical feedback. One of the major aspects of any haptical human-to-machine interface is feedback and robustness. When you turn a high quality 30 indent encoder from Alps [2] or avionics grade Elma encoder [3]; you'll realize the value of haptic feedback. There is a reason why cockpits are full of knobs and dials, although unfortunately, that's changing due to highly integrated multi-function glass instruments.

Problem with hand gestures is robustness. Theramins (hand gesture based music instrument) are cool, but they take forever to master and I am not saying they are trying to replace pianos, but let's just say - iPad pianos are not fun precisely because of the lack of feedback.

I really think gesture based controls are inferior. They have no place in my living room, my car or anywhere in my life.

That said, I think the implementation of hand gesture based systems as pointed out in this article are truly interesting. It is a challenging problem.

[1]https://www.youtube.com/watch?v=0QNiZfSsPc0

[2]http://www.alps.com/prod/info/E/HTML/Potentiometer/RotaryPot...

[3]https://www.elma.com/en-as/products/rotary-switches/rotary-s...