A snuff film is a snuff film if a real person is killed for it, otherwise it's just a movie.
Nobody is going to die in real life because you killed a character in a videogame, no matter how visceral the death is.
That's not the point. People are already disgusted at the violence in this game. It's only gonna get more disgusting and realistic as technology advances. So people either gotta roll with the times or just avoid those games, but I really doubt too many games are gonna go all in on this stuff. There'd be too much controversy and it may hurt the game's sales.