The Elder Scrolls without Daedric weapons and armor would be like Star Wars without lightsabers, so yes, Daedric items should make an appearance in Skyrim, and I'm sure they will. As to how they'll look, probably a new design, and that's how it should be. I don't want to see everything in Skyrim look the same as in past games, that's just boring, I want to see what new ideas Bethesda can come up with, so I look forward to seeing what new things Bethesda will do with classic Elder Scrolls items such as Daedric equipment. As long as it's less common than in Oblivion.
Anything after orcish and mithril was a bit much for me, ebony wasnt too bad except for the fugly helmet but elven, glass and daedric was just too.... bleh.
I like simple armor, it can be ornate just not too out there.
Simple armor is boring if you ask me, it's fine for common items, but when you're dealing with legendary items of great power, I expect something impressive. This is fantasy here, it's supposed to be fun, not realistic, and I enjoy looking at ornate armors more than looking at bland ones. You want reality, go read a history book. Bring on whatever crazy things the designers' imagination can conjure up I say.
Daedric armor always looks too evil, for my tastes. I'd rather have the high-level armor of the original game being something more morally good paladin-friendly than the demonic stuff I've seen in past games.
Daedric armor is supposed to look evil, we're talking about armor forged using the souls of Daedra here, it's not supposed to look like you're stereotypical paladin armor. Not that we can't have that too, there should be more variety in armor as a whole I'd say, whether you fancy Daedric armor or something a little less menacing, you should be able to find something to suit your tastes without intentionally limiting yourself to low level armors.