Originally Posted by Wikipedia's Uncanny Valley

The phenomenon can be explained by the notion that, if an entity is sufficiently non-humanlike, then the humanlike characteristics will tend to stand out and be noticed easily, generating empathy. On the other hand, if the entity is "almost human", then the non-human characteristics will be the ones that stand out, leading to a feeling of "strangeness" in the human viewer. In other words, a robot stuck inside the uncanny valley is no longer being judged by the standards of a robot doing a good job at pretending to be human, but is instead being judged by the standards of a human doing a terrible job at acting like a normal person.

Originally Posted by ratbastid

Sure. Painters and sculptors have been "crossing the valley" for centuries. It's moving things that make our skin crawl.

Originally Posted by Cynthetiq

Impressive stills, but stills are easy to cross the valley.

Once you have movement of film that's a bit harder to cross.

Flesh moves a particular way, there's micromotions and subtlety that humans have that make humans look human on film.

Originally Posted by twistedmosaic

Yep. Uncanny Valley has always been a motion thing, not something that still shots can capture. Also, those are quite old.