Video games are the only medium where entire productions are based exclusively on CG that attempts to mimic live action footage.
Think about it.
When films are fully CG, they are made to look like cartoons.
When live action films use CG, it's almost always to add special effects to live action footage. When it's used to replace an actor, that's considered news.
In general, CG is rarely used when it can be avoided, yet the interactive nature of video games demands it.