well that didn’t take long to google… the biggest issue for PCs is that currently the HDMI 1.4 specs for the vast majority of video cards for PCs are stuck at 30hz.
That should work okish for Cubase, unless you are doing video. Scrolling playback or even rapid scrubbing may be problematic.
Also, font scaling and bitmap scaling could be an issue (of course Mac dudes are already dealing with this with “retina” displays)