I just really want to know whether it is up there with Human Revolution in terms of a good stealth game to be honest? If it is, then I'll lay my money down in a heartbeat.
If you like Deus ex then you will probably like Dishonored very much. Dishonoreds levels are a bit more open - its more about exploring and less about taking one of three different paths. Levels are even more open than the Hong Kong hub but maybe not as large. Dishonored and Deus Ex have a similar RPG system (you unlock skills and powers) but in Dishonored you have to find or buy runes to upgrade instead of collecting XP. Runes are like Praxis points exept you can't get more of them by killing or completing quets, you have to look for them.
The stealth in Dishonored mimmicks Thief which in my opinion makes it better than Deus Ex. But thats just me. The fights are a lot more varied aswell since crazy stuff regulary happens. If you like stealth though you should definetly play on hard or above to avoid guards being blind. Dishonored have less cutscenes than Deus Ex and focus more on the story changing because of your actions. As with Deus Ex a lot of different thing may happen depending on what you do
Lets just say that both Human Revolution and Dishonored are very good games in the rare "immersive sim" genre. If you like "immsim" games then you should defenitly try Dishonored. I reccommend that you turn off ojective markers in the options and go explore as you like