Personally, I have to say it looks pretty awesome aside form a few things they've never managed to do right. For example, and this is a big one: hair. Obviously modelling hair in a realistic way is not easy. However, given their experience and the fan/modder feedback following the releases of Morrowind and Oblivion, you'd think they'd make something better than what we can see in the screenshots. Particularly the way that it appears wooden, two-dimensional, and entirely unaffected by gravity. Also note the appauling appearance of the 'casting' (left) arm and hand. I'm fairly certain that looked better in Oblivion, and hope they fix it before long. Trees and vegetation, once again look good from afar, but for obvious reasons tend to look a bit too papery close up. Oh and rocks. Those are supposed to be rounded, Bethesda!
Obviously I'm excited by the upcoming release and will almost certainly buy the game. However, some of the screenshots are somewhat disappointing, because they could've come from a modded Oblivion game. That said, Skyrim is supposed to a different flavour to Oblivion, and it's hard to measure it from a handful of carefully chosen screenshots.