I used a 30hz 4k tv as a monitor back in the day, it was not enjoyable with substantial input lag making photoshop etc impossible to use. Be patient, it will happen eventually.
> I used a 30hz 4k tv as a monitor back in the day
I used that exact same monitor!
I'm hopeful, but I'm a little less sanguine than you.
A big part of the reason why 4k got so popular is because there was so much 4k content available. And because it was easy to see how much better 4k looks than 1080p.
The smallest that I've seen is 55" and that just too big to be comfortably used as a monitor.