What is there to dislike about dishonored? the game doesn't seem to have real flaws?
Dishonored is a combination of a lot of different kinds of games. Some people expect it to be X or Y, and it's not, so they're disappointed. Some people wanted it to have more complicated mechanics (I am one of these people; I love the game, but I think it could have done a bit more in this regard), so they're disappointed. Other people are just nitpicking because that's what they like to do. Other people are angry at Bethesda for Skyrim and its problems, and they're taking it out on Dishonored. Other people like to go against consensus, so they dislike Dishonored automatically. There are so many reasons to dislike any game ...
Also, do you guys think that because the game is a new IP it will be less popular for it?
Original IPs are rarely wildly successful. This seems to have done very well, though, so here's to hoping for DLC (never thought I'd type those words!) and a sequel!