Blazkowicz
Legend
I dunno in contrast it looks to me like 3 outputs would be more useful on low-end cards. Simply because high-end cards are mostly used for gaming where there still isn't that much need for multi-head, but low-end cards are more appropriate for office use where this should come in more handy. And don't forget the existing multi-mon cards where both nvidia and amd simply stick two low-end chips on the same card to be able to offer more outputs, it is not an option to put high-end chips on those.
almost all low end mother-boards have IGP nowadays and we're moving towards IGP included on the CPU packages. Lowest end mobos have DVI-D + VGA (mine is an exception, a gigabyte full ATX mobo with no IGP and four PCI), and there dirt cheap passive video cards with a lowest end GPU and two dual link DVI ports. So up to four outputs, and you can have 3 VGA monitors or 3 DVI monitors.
So regarding office use I would say needs are fulfilled today.