Draugr aren't skeletons and I'm tired of people confusing them. http://www.uesp.net/wiki/Bloodmoon:Undead#Draugr explains them. But yes, I see a lot of uniqueness and diversity.
How would you confuse a draugr with a skeleton, seeing as skeletons generally, as their name would imply, are bones with no flesh left on them?
Regardless, though, whatever they are, if the screenshot suggests that creatures have different appearances, it's probably a good sign, though it doesn't necessarily mean we'll get variety like MMM here, since it's also possible that they're different variations of the same creature. In Oblivion too, different variations of the same basic creature type often had different models, for example, goblin shamans looked very different from plain goblins, and headless zombies, as their name implied, had no heads, whereas other zombies did have heads, and so on, so we'll have to wait and see.
I do hope to see some degree of variety in creatures, though. I doubt we'll see the kind of variety we can get for NPCs, but just allowing the same type of creature to have different appearances, without being a stronger or weaker type, would do a lot to make it feel less like you're fighting clones of the same goblin you fought earlier. I'd like to see things like different fur patterns or colors in animals, at least, and not all zombies should be missing flesh in the exact same places and be in the exact same state of decay. For humanoid monsters, like zombies, goblins, skeletons and such, I'd also say that the clothing or armor they wear should very. I like how in Mart's Monster Mod for Oblivion, you'd sometimes encounter skeletons that appear to be wearing pieces of armor, even though they were purely cosmetic and these items could not be looted from them, it gave them a bit more variety and also seemed realistic. Also, zombies really need to have clothing, at least sometimes. In Oblivion, it seems we're meant to assume that either everyone is buried naked, or necromancers are in the habit of stripping the corpses they reanimate, the latter possibility is really disturbing, if you think about it. I'd say there should also be undead of different races and sixes, while it might make sense for most undead to be Nords, since that's the most common race in Skyrim, it doesn't make sense for every single undead to appear to be a Nord and to be male, because Nord men aren't the only race that would die in Skyrim and could potentially be reanimated. Admitably, it's a pretty common trope in fantasy games featuring undead that no matter what kind of crazy races the setting has, all undead appear to be male humans, unless they're a special type that is specifically noted to be otherwise, like undead dragons, but Skyrim seems as good a place as any to break that trend.