Apple might lose. We get a distorted view of "what people want" here on these forums, because the only people who post here are the ones who really, really care in the first place.
The fact is: most people who care about GPU selection are PC gamers (a small subset of the larger PC market). The subset of those PC gamers who also are interested in a Mac is smaller again. Apple has to spend a lot to try to diversify their options. Engineering and launching a product is no small feat, and to engineer and launch a product that is targeting a market that is a small percentage of a small percentage of the general computer market is a very very risky gamble.
Whatever Apple produces to target that market is likely to be more expensive than the mini-towers the PC gamers were building on their own anyway, limiting its appeal. The general consumer won't understand the distinction, and given the typical PC buying cycle for them (buy PC with everything, throw out everything when it gets too old), won't get why they shouldn't just get an iMac anyway.
It's a sad fact that as a smaller player in the big computer market, and (more specifically) as a smaller player that faces a fair amount of pressure anyway (pushing a different OS, convincing people to "switch," fighting existing stereotypes), Apple really doesn't have the freedom to move in any direction. They're not Microsoft. They can't throw buckets of money and take losses on things for years. They have to tackle one area at a time, and right now their core markets are being served. They've decided, for better or worse, to try and crack the phone market, not the "PC gamers who want to try a Mac" market. I'll let you decide which of those two is bigger.
Would it be nice to have a headless iMac with some GPU options and an E-series Core 2 Duo? Yes.
Is it very likely to happen? Probably not.
Sorry man.
