Skyward Sword looks absolutely stunning. I'm still slightly apprehensive about the stiff animation during battle, but that's a direct consequence of the gameplay; it's perfectly understandable and likely will not be a problem once you get into it.
I'm very interested about the way the world is structured. It almost seem to be a "open" dungeon-crawler of sorts, and I'm saying that in the best possible way. Can't wait to see how far they're taking the experimental side of the title.