I think you guys are using the term wrong. It's a continuum. As something looks more human, it looks "better," until a point, then there's a giant dip where it's super disgusting, THAT is the valley. After that, it gets better. Getting good enough to get back out of the valley is the hard part.
We've had shit in the valley for a very very long time. It's disgusting.
http://en.wikipedia.org/wiki/Uncanny_valley












