My roommate has a iBook, and he loves it, although he wished he had gotten the titanium... but anyway, I love the way OSX looks, but I'm so used to windows, and PC's that I don't want to take the time to learn a whole new system. Becides, almost every software written comes out on PC first. But if Apple got on track, and joined the PC bandwagon, or vise-versa, then I would definately buy a mac as my next computer. I read somewhere, that AMD and apple were trying to combine forces... I dunno if that is true, but if it is, then good luck to Intel to try to keep up with the market share.
But what I do know is that Mac;s are really good with people who use graphic design software, or are musicians... but other than that, PC's are cheaper, and more compatible with each other...