How is Cubase supposed to get better tuned to high resolution? It really depends upon the OS font-scaling capability.
When 8K TVs come out, running Windows at 200% scaling should give good interpolation to give good smoothing. To see what that would look like, blow up a web page to 200%, then sit double the distance from your monitor, or scale Windows to 200%
In general, for good smoothing, at other than native resolution, where the rendered dots map 1:1 into the display pixels, the scaling needs to be at least double so that there are plenty of pixels into which the characters map, making edges look smoother and fonts rendering different weights more accurately.
This is what happens with modern phones with their 500+dpi resolutions. Even small text looks smooth on them. The same with 600dpi printing producing diagonal lines that are far less jagged than 300dpi (which is ‘retina’ at reading distances).
The issue is the cost and yield of very high-res displays compared to smaller mid-res ones.