I hope we get some info on the size of the levels. One of the shortcomings of the first game was how it felt hamstrung by last-gen limitations in some missions. A full set of Thief II-sized missions with Dishonored powers and emergent design would be amazing.
Edit: Actually, as I think about it more, what made the Thief levels compelling was that on higher difficulties you were actually compelled to explore the whole level to collect enough money, rather than just stealthing from point A to B. Size will only be relevant if the objectives require the player to actively explore and search the levels.