I don't really see the point of a 13" rMBA. It's over half a pound heavier than the 13" MBA, but offers only slightly faster CPU and a high-res screen. In many graphics tests, that high-res screen made it score worse than a 13" MBA in benchmarks. To me, it seems that for "Pro" users, the 13" MBA is the better choice among 13" laptops (the 15" rMBP being the obvious best choice).
If the 13" has discrete graphics, that would be another story. But it doesn't. It doesn't even have more RAM than the MBA. It's just heavier, in some cases slower, and has a pretty screen. All that bother for a whopping $300 more.
I think if my priority was to get a pretty screen and use the computer for graphics, I would opt for the 15" rMBP (the next-revision anyway, I try to stay away from early rev apple products). For any less computationaly-expensive tasks, I would choose a MBA. The 13" rMBP is sort of a pointless machine meant for no one.
I have the 2011 Air and looking to upgrade this year for a better screen due to my eyes are not what they used to be and if the new Air doesn't have a better offering in the screen reso I well switch to the 13 RMBP besides the 2014 is supposed to be slightly thinner.
If your eye's aren't what they used to be, then you wouldn't even notice that the pixels are smaller. Poor eye-sight means you need to make the text-size larger, or in general lower the resolution/scaling to make everything larger. A good screen won't make up for bad eye-sight.