I got the impression it's more Thief-like than TES-like, as regards the world. They seem to be focusing on providing variety within missions, rather than around missions. The only games I can think of that have done this to some extent are Thief and DE, so I'm excited. Hopefully they pull it off.
Its design was inspired by Ultima underworld which was made by the legendary Looking Glass Studios, the same people that made thief, Deus ex and system shock 1 & 2.