My major complaint is with the "remembering the actor's face" bit. I would think that would have the potential to ruin scenes, where lighting and subtle expressions really make all the difference in the world - not to mention the range-of-motion. However, if it's really THAT great, then I'd expect most scene groups would be using it by now. Vaporware? Maybe. Cool thought? Definitely. Potentially ruinous to quality films? Unquestionably.