Yes, Apple's lineup is overpriced, but since their margins come from hardware and not software I don't think this will change much over time.
If I am going to be paying a premium, however, I expect up to date parts. The only real issue I have with macs is that beyond paying a premium for the computers we are getting crappy parts.
Video cards in the highest end macs were never better - even at the time of introduction - than what is considered mid-range in the PC world. Even if the iMacs aren't going to have that option at the very least they can contract with ATI or nVidia to put out some high end cards once in a while for the pro machines.
It is beyond pathetic to be buying a stock Mac Pro, a $2,500+ machine, only to have a video card considered to be low end for even a sub-$1,000 PC. The stock video card for all Mac Pros today should be at minimum a 4870, with at least one other higher end option available.
And Mac Pro's really aren't that expandable as people say. You can boost RAM and the HD (as you can in an iMac if you really do desire), sure, and maybe change out the processor if you want to perform major surgery, but really beyond that there isn't much. You can pop in some sound cards or eSATA cards or whatever if you want, but video card options, a favorite upgrade for gamers, are so limited its not even worth it.
Even their latest video cards don't work on Mac Pros that are just a generation or two behind from what I heard, which if true defies the purpose of getting an "upgradeable" mac.