I played Dishonored for 3 hours straight, and really wanted to like it. The art style and character designs are brilliant, but the story and the world as a whole seems to be shallow. I also found the level design to be pretty counter-intuitive if you want to play stealthy.
Lot of the times, there's just no place to hide, even if you use the teleport thingy, and no chance to stealth-kill without being spotted by the two other blokes standing around in the same room. Butchering everyone after being spotted on the other hand is way too easy.
I liked the level design and stealth sections of Deus Ex HR much better, even if the story and characters pretty much sucked when compared to the previous titles in the series. Maybe Dishonored gets better a few more hours in, but I'm not really interested in playing it after the initial phase.