I have a 28" 4k and a 24" 1920x1200 monitor, cubase actually looks worse on the 4k monitor, everything is blurry. Hopefully 8.5 will fix this.
See this thread
Hi guys Wondering if the Steinberg mods are able to indicate whether Retina support is being worked on for an update of Cubase 8, or whether this won’t be on offer until C8.5 or C9? Probably pushing it, but a rough ETA for this would be valuable...