I'm 7 hours in, and yes... it's a very worthy successor to Thief and Deus Ex, as well as Dark Messiah (same studio). Same sort of "linear nonlinearity," where each level is its own self-contained sandbox full of different ways to do things and many different paths. Same sort of focus on sandbox stealth, but with some deliciously fun combat options if things get out of hand (it just costs more resources to be violent). I believe that it's even possible to get through the entire game without killing anyone, including your targets (every one has had a nonlethal way to dispose of them so far). Combat is quite punishing as well, and it doesn't take more than 2 or 3 hits to kill you. So you have to be creative with your powers, and actually use stealth and strategy.
Unlike Bioshock, Dishonored
feels like the games it emulates rather than just copying some of their mechanics and plot points. It doesn't take long to slip into the same sort of mindset. Although it does do the Bioshock thing where instead of giving you a nice simple RPG inventory, it divides everything up into a bunch of different menu screens and quickuse slots. I could have done without that. Oh, and there are objective markers. You can turn them off, and the game usually does a good job of giving you enough information to find your objectives without them, but there are a few cases where it's obvious that they were expecting you to use them (for instance, you're expected to go talk to one guy, but nobody ever tells you where he is).
Charon121: How similar is this to Assassin's Creed? I hope it isn't one of those games that dazzles you with many "options" in the first two hours of gameplay, and then you realise you do no more than five activities for the entire game that are always the same – the way it was in Assassin's Creed (where you essentially only had assassinations, fights against guards, and climbing towers, with very little variation).
Really not similar at all. The only major similarity is that both games are about assassination. And in that respect, it's a lot closer to Hitman than Assassin's Creed (at least judging from what I've played of Assassin's Creed).