00konichiwa00
Prince
First, they would have to make the game SMP (Symetric MultiProcessor) enabled so as to take advantage of the now-ubiquitous multi-core CPUs. Second, they have to make it capable of addressing a lot more memory that it does currently. Those two items alone would necessitate a re-coding of the game. Absent that, all of the new features will cause the same slowdown that now plagues the game. Civ needs new features in the areas of trade, combat and diplomacy, among others. Then there's real 3D terrain, weather, and a few other things.
Isn't it just to add stuff but not improve graphics or maybe lower the graphics. I wouldn't mind a little bit less graphic quality for a better game