Well, I've always been a console gamer to the core, never been a huge fan of PC gaming (partially because my PC is a decade old). However, I've been allowed to borrow my friend's laptop for a few days, and his copy of Oblivion. He's got it on max settings, with all kinds of visual improvement mods (Qarl's Texture Pack 3, Natural Environments, Better Cities, some body replacers, item texture replacers), and I don't think I'll ever be able to play the 360 version again without being disappointed. Oblivion just went from "Best-looking game I'd ever seen in 2006" to "Best-looking game I've ever seen."
The 360 version of Skyrim is suddenly not sounding like such a great idea.