Dishonored is a decent game to use to soak up time while waiting on AC3. Graphics are alittle on the weak side, and the sound is not to polished. I did notice a few collision problems that would make a physics professor mad.
The enemy AI is good at times and really really bad at other times. I found it frustrating that an enemy would alert at times that (atleast I felt) would take a person with super human hearing.
I felt the whole time playing Dishonored that it would of been really great if it would of came out before AC. I would say its nothing more than a time sponge for me. It could of been better with some more polishing and testing, but I understand them wanting to get it out before AC3.