I can see how photographers want faithful color reproduction with a wide gamut, good image consistency across the whole display, good resolution, and a decent size (maybe 32" tops?)
But AFAIK, monitors with those qualities are already available. The only thing I can think of that would make them better suited for professional work is to bring their prices down. (Because even pros have a budget.)
That's this one, for anyone wondering: https://en.wikipedia.org/wiki/IMac_G4
Apparently they had quite considerable problems with the arm becoming a bit loose!
The last Thunderbolt Display had USBs, ethernet, additional thunderbolt, even Firewire, and I use all of them. I can scarcely find a third-party Thunderbolt (not Displayport, Thunderbolt) display that has more than a couple USB ports, let alone the rest.
Believe me, I'd love to settle for a cheaper Dell, but as soon as you throw in a serious Thunderbolt dock (they start at $200), you're spending nearly as much, and now you've got some clunky lunchbox on top of your desk to boot.
I don't see any signs that the market won't repeat this pattern.