I think that satellites should reveal the world map, and perhaps allow you to build a small wonder (satellite network?) that would pretty much keep it up to date (city sizes, exposed unit locations, etc.). I won't argue the "realistic" aspect here, we have that going enough places, but anyway that's what I would like to see. I think we all know that the AI Civs are aware of the whole map throughout the game even though there are some restrictions on their cheating, so after this they could use what they already know and the human player could finally have that knowledge also!
I would like to see "smart weapons" tech give me a guided missile that can seek enemy units and chase them automatically, even if I can't see them, but fails and disappears if it doesn't hit the target when it reaches its limit of range.
I also would like to have my Civ II style Solar Plant back. Okay, so it isn't realistic to be able to eliminate pollution, but Cure for Cancer is still in the game, so why not the pollution-eliminating solar plant?
Oh, and after computers (isn't there an Internet something in PTW) I want to be able to build Network Administrators that, when "garrisoned" in cities, reduce waste and corruption. Don't tell me that's not realistic, I know! Either that or be able to built "the Internet" and have it reduce corruption and waste overall....
JMHO - you did ask!! :rant: