Skyrim isn't beautiful in a graphics sense, the great thing about TES is the art. I couldn't care less about graphics.
Also, Crysis isn't a huge Open world RPG packed to the brim with content. Is it?
From all the footage of Crysis that I've seen, it looks fairly open. Though, for a shooter, I'd guess it needs to be slightly more linear. Either way, everything in Crysis was photo realistic. I don't know why, but I have a thing for water, and some games do it really well. Until now, I thought Bethesda had done a bang on job, but looking at the stream in this leaked footage, when the guy was standing over the water, the lines of white that were supposed to represent its bubbly movement or whatever, it just looked so bland and fake. Great far away, terrible up close.