Those sound ludicrous -- are you describing a real product in this space? OTOH I think real subtle hand gestures could be a great input mechanism. The interfa

Those sound ludicrous -- are you describing a real product in this space? OTOH I think real subtle hand gestures could be a great input mechanism. The interface used by the now-abandoned "Soli" might be worthwhile. Voice interaction seems very tedious and embarrassing to use in public.