I don't understand. I've read about the uncanny valley and I get why it would be unnerving to see a realistic human robot, but I don't think I would ever have a problem with good game graphics. I mean it'snot like they could have graphics better than say the movie Beowulf or Polar Express in a game for many many years, and neither of them made me uncomfortable with the animation.
The idea behind the uncanny valley is that things look so real, yet there is something off, not quite right, something beyond "robotic" humans. Its one of those things that may not seem like a big deal, but it really is. You don't know how bad it is till you experience it.
If you have seen Tron, then remember Flynn's face as a real person, and the CG one they made to make him look young. There was something off about the CG face despite having done full face motion capture.