What Microsoft Plans To Do With Display Scaling
 

Do you think Microsoft will ever manage to perfect display scaling on Windows? One of the reasons I intend on getting a huge 4K display in the future is so I can potentially skip scaling altogether. …classic desktop apps are unfortunately still utilizing older Windows "system scaling factors," resulting in blurry bitmap scaling when docked on a second monitor. Other poorly displayed bitmapping desktop applications include Notepad++, Chrome, and Firefox. The Windows team is working feverishly (well maybe not for Chrome of Firefox's sake) at improving migration tools for more complex Win32 applications.

http://www.hardocp.com/news/2016/01/...splay_scaling/