PC has heavy background workloads and developers need to worry about compatibility, which requires a certain midle layers (directX for example) to deal with different hardware configuration. you just can't compare the spec directly. though PC does offer better resolution and better AA, the lighting (which i think is the way more important than AA), physcis and AI are still at the similar level of consoles games. so not too much of a whole generation ahead but PC graphics is definitely better than consoles to some extend.
on a serious note, I'm curious to see how the next generation consoles can wow me. the best graphics in this gen is quite close to real life imo.







