All, I am planning on doing away with my late 2013 13" retina MacBook Pro that is hooked up to a 27" Thunderbolt display and swapping it out for a 27" 5K iMac that was just released. I typically run MacOS X and Windows side by side (I have no strong preference but do appreciate the significant snappiness of Windows 10. Can anybody confirm/disconfirm that Windows 10 properly supports the 5K iMac resolution in a way that is similar to "Best for Retina" on the iMac? Is scaling working correctly and is the text, icons and just overall user interface as sharp and smooth as it is on Mac OS X? I'm asking the question because I read a couple of days ago that only 4K resolution was supported in Windows 10 but I may be missing things. Basically what I want to know is whether Windows 10 with its HiDPI support will have the same "Best for Retina" screen real estate and sharpness as Mac OS X. I would appreciate any help on this topic.