Some games, actually have and edge over what they would have been like if they used polygons.
Muramasa would not look like a painting id it wasn't for the 2D graphics, and in Starcraft, you would not be able to distinguish units that easy if it wasn't for the 2D graphics.
So I really don't get how someone can say that every single game would be better with 3D graphics.
I LOVE ICELAND!