Would having a retina computer display (or another high DPI display) allow lower non-native resolutions to appear better than typical non-native resolutions would on a non-retina LCD display? Or does the problem just scale, regardless of the fact of wheather or not you can see the physical pixels or not?
closed as not constructive by Mokubai, Kyle, Breakthrough, techie007, Nifle May 2 '12 at 17:47
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Retina branding aside, a significantly higher resolution display would improve interpolation of lower 'non native' resolutions when they are scaled.
When lower pixel resolutions aren't divisible by the native resolution (half/quarter exactly) then the pixels must be distributed as best fit over the native width of the screen. This results in some being wider than others, some incurring blur and other artifacts.
A higher native resolution goes a long way towards hiding these artifacts as a higher density allows for more even approximations and smaller artifacts relative to the pixel size. This is why resolutions that sit a little below the native resolution often look far worse than those significantly below it.
"Retina Display" just simply a marketing term that Apple has applied to the specific resolution of their iPhone and iPad. The iPhone4 has a resolution of 960x640, at 300ppi, which at 12 inches is considered (arguably) the most detail the human eye can distinguish... thus why they call it the Retina Display.
It is still an LCD display. It does nothing different from any other LCD display. So, no. It does not make non-native resolutions better. In fact...
That's from the same Wikipedia article you linked to.
SO yes... the problems do just scale. It's just an LCD display with a better than average resolution.