While very cool, and I want one..... I can't justify buying the rMBP's... A cheap dual-core atom Thinkpad Tablet 2 running Win8 and a docking station meet most business desktop/mobile needs dirt cheap. While *I* would notice and make use of it, I can't justify it for my users.
I'd hate to be one of your users. The advantages of faster CPUs or fancy SSDs isn't in maximizing performance all the time, but rather day to day life with the machine gets nicer overall. A dual core Atom would be an awful day to day experience. Things will run, but not very well. Besides, how cheap is your company if you can't afford nice things for them? I'd hate to see what your bathrooms look like.
"Sure, a toilet would be nice, but a hole in the ground works just as well!"
As integrated video chipsets get faster and the displays get cheaper, it'll be mainstream. Like I said, I love the displays personally but I can't justify the additional cost. If the screen can do at least 720p then it's good enough in most use cases.
As of Ivy Bridge, integrated video is already good enough. OEMs are trapped on two sides. First, margins are slim enough already, trying to add decent components is a hit they can't afford to take. Second, does Windows 7 or 8 even support actual high DPI screens? Or is it stuck in 72 DPI hell?