This is slightly unrelated, but still pertains to the Tech Tree.
In Civ3, the style of city buildings changed when you reached a new era. For example, upon reaching the Industrial Age, all of your city icons on the map would show factories and smokestacks (and the city view showed more advanced roads and buildings within the city). Since the Tech Tree in Civ4 no longer has set eras, will the style of city buildings change like they did in Civ3? And if they do, when do they change? Have I missed some information regarding this, or do we not know yet? To my knowledge, all of the screenshots we've seen so far have been of the early game (early Medieval age and before), so we really don't know what cities look like in the later game (Industrial and Modern Age).
Anyone able to shed some light on this for me?