^Well look at it this way, MC1 is so *HUGE* it makes even the most sprawling real world city look like a piddling housing estate by comparison. So whatever was show in the movie is just one "small" area. There could easily be several more densely populated sectors that look much more like in the comics and with a bit of luck, we'll see them in the sequel(s). Also keep in mind that those "modern" buildings crowded around the futuristic blocs would be mostly 100+ years old. That whole sector is a run-down slum.