I was put off by most (not all) of the screenshot. I just don't like the angular 3-D graphics.
Oh... and then there's the fact that it's not out for the Mac yet anyway.
... and the fact that when it DOES come out, I won't be able to run it on the Mac I have.
...aaaaaaaaand I'm fairly recent to Civ3 and I'm having so much fun with it and the different possibilities, tactics, Civs, etc.
Plus,I'm not a big gamer, in fact Civ is the only game I play and have played since DiabloII which was 2-3 years ago. So I don't anticipate any heartfelt yearning to move to CivIV anytime in the near futre.