I really hope that the requirements are not that high. I gave up on Desktop computers years ago to stick with just laptops. Keeps me from having to have some type of dedicated desk just for a computer. Civ IV has run well on my last few laptops (First was an Acer Aspire 5100. Turion mk-36 CPU or something like that with 2 GB of RAM and a crappy on board graphics card.) Large maps ran a little slow and the laptop got pretty hot, but it was more than playable.
Right now my best laptop is an HP G71. Intel Core2 Duo T6600 (2.2 GHZ) with 6 GB of RAM, 17.3" screen, and crappy onboard video (Intel 4 series Express chipset). I'd be fine with getting a new laptop this fall, but if the game needs a serious graphics card I will be disappointed.