No, it's not. It's for gamers. Anyone who doesn't agree simply isn't a gamer. Demographics show mostly adults playing the system.

The same thing was said about the Gamecube but the best shooter (Metroid) and horror game (RE4) of 2006 were on the Cube.

Just because a game has simplified graphics doesn't mean it's for kids. That's like saying only kids read the Sunday comics and adults only read the political cartoons in the paper.