They're also saying the Radiant system should do wonders for making it "unique". Sort of if you get a quest sending you to a dungeon, but you've already visited dungeons a, b, c and d in the area, the system will identify dungeon E as the on you have to go to... Just to make sure you "explore" the world and don't have to backtrack.
I don't know, after all the disapointment over Oblivion, this is definitely on my wait and see list rather then jump on straightaway.