I have to confess I am flabbergasted by your ability to misunderstand (willfully?) what I think to be plain and clear english.
1. I never said anything about people having to accept 2D-only (and the G200 was not 2D-only, by the way), I pointed out that GPUs nearing 15 years old were already able to produce resolution you consider "overwhelming" and that a modern IGP would thus have more than enough power to handle it
2. The dedicated GPU note was to point out just how far beyond those resolutions you consider "overwhelming" a "modern" (Evergreen — and the first Eyefinity release — is 3 years old) dedicated GPU goes
I understand fully well that it is not _difficult_ to drive a lot of pixels if you want. Many modern cheap cards and IGPs however cannot, for whatever reasons: they physically have no support for dual-link DVI. Maybe they saved 50 cents on some connector that way, or whatever.
Note that I never said anything about overwhelming a dedicated GPU. That point was about cheap IGPs, specifically from Intel. (EDIT: OK I didn't explicitly say it, my fault.)
Ultimately I guess it boils down to priorities. PCs have gotten a lot cheaper, and some of that has been done by making things worse.
Personally I would like high-dpi as much as anybody here - although for now I think I'd first want a lot of screen estate (13" is a bit limiting at times), but I probably use my computer for reading a lot more than other people.
A $50 AMD card will get you at least 3 1920x1200 outputs. I am not sure if the HDMI port on them can be driven any higher, it possibly can though.
I am not sure what the max resolution on AMD's Trinity line is if they have Display Link or HDMI. Again, it may very well be up to the max Display Link or HDMI supports, which is pretty damn high.
Edit:
Turns out Intel also supports 2560 x 1600 over Display Port.
