So I was reading about the MBPr and its unmatched resolution. One question comes to mind, as more pixels are crammed into say a 14" display, the size of any object would reduce.
A 1080p frame from a video would have the resolution of 1920 × 1080 as opposed to 2560x1600 of MBP.
To make full use of the real estate on the display, one would have to upscale. Would the quality (theoritically) suffer as a result of upscaling? Which display would fare better - 1920x1080 or 2560x1600?
That's not quite the way it works. The system takes care of scaling things up (not sure of the exact details) and with so many fine pixels to work with, there's no blockiness. So things tend to look sharper, not always smaller. You can also change the apparent resolution.
If you have someplace you can go to see one in action, do so. The clarity is very very nice.