I have trouble making out details on my 45" UWQHD (3440x1440) displays... so I don't see much point.. maybe slightly easier to read typefaces... I am already zooming 25% in most of the time.
On the plus side, I can comfortably fit my editor on half the screen and my browser on the other half.
Most people run in some hiDPI mode so text doesn’t become tiny
But 1440p on a 45” is not good PPI. That could be why you’re struggling to see text clearly