With software like 3D Max, Maya, Mental Ray and ZBrush, CG Artists have been able to create unbelievably realistic models of famous movie stars. Here is a video comparing the 3D models of movie stars like Angelina Jolie and Johnny Depp to their real-life counterparts. It is safe to assume that in just a few years, characters in videogames will look just as good as these 3D models.
NOTE: PLEASE use view video link at bottom if video is not working. Embedded Gametrailers videos have not been working for a while.