Hmm, not very revealing - but it doesn't look bad.
I wasn't a big fan of Dishonored - but I don't think it looks too much like it. At least it doesn't have that awful Team Fortress 2 cartoon vibe - and I appreciate that.
They're saying it's the team behind DE:HR - but I believe that's a mistake. It might be the same development house - but it's not the same people. I remember the DE:HR team specifically mentioning that when they were finished with the game, the new team took over and moved into the building to start work on Thief 4.