I posted above why higher DPI does buy you something. But Another problem is this. We get stuck in a cycle, you wont buy a high DPI monitor, and others, so the demand does not produce supply to bring down prices. Display companies then do not produce high DPI monitors. Then standard makers do not produce standards that can drive those displays, then programmers get lazy and do not code their software to take advantage of high DPI. Each group is looking at the other and the end result is no one is willing to move.
Just sucks to be in this situations. Luckily after almost a decade of stagnation we are finally moving out of this trend, but it is only because LCD makers are needing to find a new reason to sell us another monitor since many people no longer see any need to upgrade.
I agree. It's a game of pass the buck between OS, programmers, and monitor manufacturers. I'd love to see super high res monitors--honestly, I would. But right now with the current state of scaling it would be a waste of money for me.
It's probably going to take the clout of somebody like Apple pushing the issue. The pixel doubling on the "Retina" Macbook Pro is forcing the market to respond. Maybe that will trickle down to the rest of the market.