most people don't give a shit. This is the same excuse people give when 30fps vs 60fps debates come up, or resolution. CoD looks like dogshit and it was breaking it's own sales records that it set. Crysis 2 looks great, no one bought it on consoles. No one even bought the third.
even on PC where we're all graphics whores, the most popular games are ones that can be played on toasters.
Graphics are for fanboys that feel the need to tell other fanboys they spent their money wrong. It's not to sell systems.
Hell the highest rated PC game this year looks like a worse looking clone of Earthbound, but the game is fucking amazing. I personally hate what graphics is doing to gaming.
Like even a toggle would be great. Allow me to play the SP at a lower resolution and have 60fps but leave the 30fps option for those who would rather look at pretty things