When will pc graphics start to really outpace console (this gen) graphics?

[Reasonable]

^^
I'd say you're right on that, point. Not that I believe any 75% games are going to jump up to 95% all of a sudden, but PC titles tend to be 2% to 5% below consoles in most cases so far as I can see, more if the PC version is clearly worse, and occasionally where a game is very PC centric it may score more.