Nice piece of technology. Although this is nice and opens a really broad field of opportunities I see a problem in the fact you have to wear a ring for it being widely used. Yeah I know the rings is mandatory and it won't work otherwise but still I really see a problem in that. And yeah of course this more looks like a prototype than a finished product. Due to that fact I mainly can see this being used as game controls or anything and not really a thing used every day.