3x the screen resolution...a little less than 1x the usable screen real estate. Comparing to a high pixel density display isn't really fair. The Surface Pro is 1920x1080, but that is all usable space, no pixel doubling for non-"retina"-ready apps.
I just don't want to see any pixels from 10-15 inches away when I'm using it in bed. I doubt the surface will be able to accomplish this feat. I have superb vision and cannot discern pixels on an iPad unless it is within a couple inches of my nose.
I suspect that you are in the minority, outside of tech circles. I'm yet to meet a non-techie that "requires" a "Retina" screen on their device. MS describing it as "HD" will likely suffice.