Man! Every so often I go back and look at their procedural city builder and have a little silent cry. I think there's an open goal waiting for someone like Introversion to create a really fun city builder using that kind of tech. It's the only way, I think, we'll be able to play a game where the cities actually look like cities.
Hey, if you're interested, SlowRiot's written up some of the differences (and similarities) between our city gen and Introversion's one for Subversion in a response over here: http://facepunch.com/showthread.php?t=1379594&p=44362791&viewfull=1