Looks like this thread has been hijacked by those of us who are arguing on why 3D should or should not be used while the OP has long move along.
Anyway, I am one who support the use of 3D in latest games. I agree with those who said that a new PC today always come with better hardware and why not utilizing something that is already there? But at the same time I also agree with those who argue that if 3D is used just for the look then why not just stay with 2D. In fact, I dont mind if there are no graphic at all if the gameplay is good! But of course, with a complex TBS like Civ it would be much easier to absorb the huge volume of data by looking at some graphics instead of just a whole table of raw datas. From what I have read from above, I see people mentioned about machines like ZX-Spectrum, C64, Amiga (which was actual a class above the rest in term of graphic capability in its days

). I am sure these people will remember a great software company that is call Infocom. It produces the best adventures ever that none even come close up to today! (Hitchhikers guide to the galaxy anyone?

) And those games had no graphic at all whatsoever eventhough by then there are already graphic adventure in the market like Sierras King Quest (so bite me, I am from the older generation

). That is the best proof that a good game does not need good graphic to support it.
So what gives with Civs 3D graphic? Someone said its easier to produce unit graphic in 3D and all Firaxis units were made in 3D first before being convert to 2D anyway. That is true, but does it really save time in making them? And I must once again stress that a good 2D art can give more depths that a crappy 3D model. And someone mentioned that it take a while for a decent unit to be out back in Civ3 days. If I remember correctly, I think within a month or 2 after the game came out we already knew about how the graphic for unit works (thanks to the hardwork of some board members and the help of Dan Magaha from Firaxis  ) and about a month later I had already posted my Perry class cruiser on this board. (and I am no 3D graphic artist either

) And of course with great talent like Snoopy we soon have a completely new tile set look many many times better than what was originally shipped with the package. (which, btw I think is more beautiful than the 3D ones in Civ4

). And I cant agree better with the one who says hills in Civ4 looks like land boobs.

I think that is because it is an unfinished job. I believe originally whoever work on the project figures that since it is 3D it should support layers so the basic core codes were build along those line. However, due to reason unknown to us, this was not being implemented by those who finally code the map engine and thus we ended up with mountains and hills that do not link. Chains of hill and mountain definitely look better in Civ3 than Civ4 because they actually link up properly.
I believe our argument here is not whether 3D is better than 2D. It is not on hardware issue either because frankly, 3D graphic in Civ4 should not be that demanding on hardware anyway. (unless, of course, the programmers did some lousy work made the program unnecessarily large and bulky and thus take up unnecessary processing power

). What we want to see is that Firaxis make real use of the 3D capability of todays PC and not just use 3D for the shake of 3D. Take a look at games created by one of the greatest Jap company, Koei. Some of their game series had already reached the 12th installment and also moved from 2D to 3D somewhere along the line. For those who are not familiar with Koei, it is the company who produces the ever popular series like Romance of The Three Kingdom and Nobunagas Ambitions. All their past games were TBS, which is the reason why I like to compare them with Civ. In fact, I believe Koei might have stolen some ideas from Civ2 (like tile development outside of cities, trade caravans etc

) cause those games that they produced backed in 1998/9 really gives a Civ like feel (Nobu6, Genghis Khan 4 etc). However, each of the new installment is one hell of an improvement over the last one. And that is in every single department, graphic, interface, AI, concept. Look at the 3D for Nobu12 (which is basically the same engine from Nobu11 which was a 2003 game by the way

). You can zoom in and out with the roll of the mouse wheel and rotate the whole map on the fly by just holding down a mouse button. And of course you can tilt the angle of the camera to your liking. And yeah, the map is animated of course. And of course height is taken into consideration when resolving battles (height were already taken into consideration back in Nobu6 days, not mention things like flanking, ambush etc  ) So, if it can be done by a Jap company, why not Firaxis? Really, when I first heard about Civ4 goes 3D and after seeing a little preview I had great hope on the 3D landscape. But of course it was one huge disappointment when the actual game came out. Even 3D back in Alpha Centuries was better implemented.
