Rage and prey look alright, but skyrim looks great to me! Yea they don't look as good as those new unreal images with the new engine lol, but it still looks good IMO.
The developers have said that the PC will look different than the console because they have made some high resolution textures that the console won't use.
If you don't think there is a huge improvement in graphics with Skyrim over Oblivion, you aren't looking very closely. Look at the pic with the guy walking into town and see all the muscle groups on his arms. Just the definition on the characters is a huge leap forward. The envirnoments are much better too and I plan on exploring every inch of Skrim