It looks realy akward when he needs to hold his arm still while closing his hands. I'm skeptic of the current state of "gesture/3D/motion/whatever" controls, b

It looks realy akward when he needs to hold his arm still while closing his hands. I'm skeptic of the current state of "gesture/3D/motion/whatever" controls, but there is a big potential here. 3D design tries to work around the problem of working with 2D screens by showing multiple sides at once (Front/Left/Top/Perspective). You have to adjust objects in at least 2 screens to get it right, which isn't a perfect solution as well.