- More spells like Teleport, Open Locks ...
- More creatures (Minotaurs for exemple..)
- A barber

Attributes
Armor Degredation
Branching quest lines
More impact upon the world through your actions
TES VI to be 100x bigger than Skyrim in every way

Damn, how could I forget?

6. Weapon and armour degradation, and this next bit really does justify the use of capitals, BUT NOT LIKE OBLIVION'S SYSTEM OF PRESS 'A' OR WHATEVER EVERY TIME YOU KILL A RAT OR TWO.

That's the whole point! Creepy noises, hearing draugers walking around not knowing where they are, traps, etc. Sounds like alot of fun!

.....Until you fall off an edge and fall into the abyss.