My 2 cents, to me consoles are more casual and 'fun', you play them when having beers with buddies etc. With PC it's more indepth, but seems like the indepth-section of PC games isn't what it used to be, there aren't many games like, say, Fallout 1 and 2 out there. Console has casual fun going for it and IMHO it seems like these days casual fun is evolving quicker than indepth-style games.
And yes I know about Wasteland 2 etc. type releases, just hoping for the next 'step' in indepth gaming.
And as such, casual gaming goes back to the basics of gaming, the fundamentals.