I have a 13in rMBP. I liked it at first, but is pretty heavy. (Performance and battery life are amazing, though).
I think I'll return it for an Air. I can tolerate a non-retina screen, as long as it's light. I'll probably get the 11in one. Shame it doesn't have an SD card reader built in, otherwise it would be prefect.
OR, I might just get an iMac; it's a shame that none of the off-the-shelf models have flash storage.
If they were to have a massive new announcement, like a retina Air, that would surely be at WWDC in June.