Until (about) 2002/2003 people were still happy to play NES-like graphics on their Gameboy (color) system with very little concern for the "Graphics."
A couple of years ago I heard that the "best selling game" of 2004 wasn't Halo 2 or Grand Theft Auto: San Andreas but was (in fact) a Pac-Man system that plugged into your TV; these were Atari games that were repackaged and sold for (IIRC) $30 and became a smash success at christmas.
These may seem like odd examples, and I'm certain people will claim that they're different from the home console market but I'm not too sure they really are. People are motivated to buy videogames and systems because they're inexpensive fun not because of their graphics. This seems unusual to a lot of people being that they represent the "core" gamer because they want Pixar level graphics in order to give them the most involved gameplay experience.
