I'm not sure if it has been posted about already, but it looks like the map maker company TeleAtlas is planning on making 3D maps of major cities in the near future. They're releasing major European cities in July, and US cities next year. I think the 3D map idea seems pretty cool and will make these things even more realistic!
More info:
http://sev.prnewswire.com/computer-electronics/20070503/NETH03903052007-1.html#
More info:
http://sev.prnewswire.com/computer-electronics/20070503/NETH03903052007-1.html#