The truth to realize here is that the vast majority don't care that it looks better. A lot of people can't tell the difference anyway. The path of least resistance to getting into gaming isn't PC gaming and that is what matters most.If only people would stop playing PC games at lowest/medium settings and complain it only looks slightly better than other versions...
I'm rather interested in what will happen to PC gaming once MMOs leave it behind. It has to be on the drawing boards everywhere.
As for Deus Ex 3, well I would be shocked to find it being PC exclusive. Maybe for a week or something. I can't believe any developer/publisher would even consider this anymore.