You're right!
However, I had a look at the Debian packages of Lincity and Lincity-NG and the former seems to suffer from the same resolution issue like Micropolis.
But I think Lincity-NG (using SDL) should in principle work on the N900 after optification and some minor adjustments to the dependencies (even the GUI should be pretty N900 friendly). I'll give it a try this weekend. My biggest concern is that the CPU might not be up to handling the game, at least I'm almost certain that complex scenarios will become sluggish at some point.