I have a 2011 MacBook Air 13" w/1440x900 display which I'm very happy with. Except for one thing: The resolution is a little too low for some of my work duties. More specifically, I use Parallels to then Remote Desktop into a remote Windows machine where I then use a GUI-based programming/database tool. The tool has lots of little widgets all over the screen, and my current setup requires that I have to scroll around a bit more than I'd like. I also sometimes want to have a couple of windows up and in view at the same time. I'm contemplating upgrading to an rMBP and giving my 13" Air to my daughter for Xmas, but I'm worried that a 13" rMBP screen could actually be a step down in some ways. The native resolution of the 13" rMBP is 2560x1600, which sounds impressive, but I'm worried that for using the Parallels/RDP/Windows environment, I'll have to either use it in native res mode, where 2560x1600 will probably have pixels way too small on a 13" screen for it to be usable, or that I'll have to use it in pixel-doubled mode of 1280x800, which will give me a lower resolution than what I've currently got on my 13" Air. I know that Apple supports intermediate resolutions, including 1680x1050, but: a) Will the Parallels/RDP/Windows config even support that?, and b) How well will it really scale? Another possibility would be to go up to a 15" rMBP, which would offer me a pixel-doubled mode of the same 1440x900 resolution my 13" Air offers. Yet another option would be to track down a 15.4" non-Retina MBP w/native resolution of 1680x1050, but I really don't want the added size, weight, or DVD drive, and I really do want SSD. I appreciate any help here, especially from anyone who has used Parallels/Windows in one of the "in-between" resolutions on either the 13" or 15" rMBP. If you can provide any photos which clearly show how good/bad that looks, that would be even better. One last point: I'm on Parallels 7 right now, and have been a little upset with their lack of a low-cost upgrade to Parallels 9 (which has kept me from upgrading my Air to Mavericks), so I'm also open to switching to an alternate Parallels-like program in case that makes a difference (if a Parallels-competitor offers better quality "in-between" resolution support).