There's this thing called scaling that allows you to see things in an appropriate size but higher definition.
Anyone who uses spreadsheets regularly wants the extra real estate. Anyone who works with complex documents wants the extra real estate.
It's not about more dots on your 24 inch, it's about larger monitors that can display more stuff simultaneously. Instead of 4x 1080p monitors you can have 2x larger 4k monitors. Offer this to anyone who makes money by staring at a screen all day and they'll tell you it's worth it.
I honestly find this hard to believe. I have 2x 32 inch monitors on my desk and in 1920x1080 they're ugly to the point of distraction.
4k isn't that expensive. you can get 32 inch 4k monitors for a few hundred dollars.
Scaling is not the same as reducing the resolution.