Because they're idiots, Tater. And they don't know what they're missing.
And Dave, Hear Hear! And this is coming from a hardcore pixel junkie. I enjoy those sorts of environments, and I will note every little detail. It might be a chick-thing, though. You know how you can walk through a room that you think is perfectly clean but then your wife will come in and exclaim that it's filthy and starting cleaning up stuff you didn't see? Possibly related to that one. That could also explain my sorry score in some of these games. Too much time staring at the walls.
But graphics aren't the seller for me. I want a good story, and a good game. The console guys have to know this at some level - I mean, why would they have chosen FFXII for their PS3 rendering demo? They could have gone to town with any number of other properties. They know they had us all hooked with the story and the game, and adding eyecandy was just topping.
Now, graphical bugs, that will kill a game for me. Clipping problems and textures that are skewed or not mapped correctly in particular. I'll probably finish it, but I probably won't play it again. But those things aren't caused by how many polygons are being blown downrange. That's the skill of the artists and the developers.
"Oh good, I've been looking for something to do since I found out that Sudoku didn't involve ritual suicide." - Sam and Max