And I assume you also mean content providers will also be forced to shoot their videos in 4k/5k resolution? (I don't think so)
I understand this is a big + for monitors. I have used Dell ultra-sharp 32" @ 3840x2160 with display port and it's fantastic. Larger workspace, better gaming, better multitasking!
I don't care that much about video. Full HD is plenty fine with me.
I care a lot about text, because that's what I consume almost exclusively day in day out at work and in my spare time when I sit in front of a screen. And nothing profits more from high contrast and high pixel density than text rendering.
I just inherited a Dell XPS 13 with a really nice Full HD screen from a coworker who quit. I've got running Ubuntu on it with a scaling factor of 1.5. Not quite Retina, but pretty sweet nonetheless. I was going to use it with an external screen, but after getting used to this laptop I couldn't stand looking at the external screen anymore and got rid of it. Work (programming and writing) is a lot more fun with this setup.
My spouse just got a 13 inch Retina MBP. She's pretty stoked as well. Even her half blind mom can see the difference.
High resolution screens are great and as sooner they become standard the better.
I understand this is a big + for monitors. I have used Dell ultra-sharp 32" @ 3840x2160 with display port and it's fantastic. Larger workspace, better gaming, better multitasking!