I would just be happy with a 4k monitor, so we could go retina with our desktops.. and realistically - dslr cameras as we know them will probably be obsolete before this feature is added some day to a mirrorless variety of camera which relies on retina optics for viewfinder.
Which will be pretty cool, I guess.. as long as the evf is realtime and does not black out for shutter release...🙄