Perhaps you haven't watched Inception?
Anyway there was a point in my life that most of my dreams were lucid. This stuff shouldn't be used though that would be like invasion of privacy or something.
Oh, I saw it... But there's also "this". (<== another one of my creations) I've been fascinated with dreams for as long as I can remember. But the idea behind this makes me cringe. I don't want people in my head. There's enough of me in there that I can't fit any others - or machines for that matter.... just sayin'.