CG characters have been getting more and more believable. Subsurface Profile shading for skin was a huge step forward. Now, in the video above, we see that Disney is pushing the envelope for realistic eyes.
If you are squeamish with eyes, this video will probably bother you. If you are not, it is really cool to see the virtual eye react to virtual light by adjusting the size of the pupil.
Every so often I ask, "When will actors as we know them be replaced?"
I don't think they will be replaced per say, but I do think that they will be transformed by the advancement of the CG medium.