I am hoping that the 13" with retina will be announced in June.. do you think this is unlikely? If not, I would go with the MBP.
i'm no insider, nor am i an expert by any means, but I think it is extremely unlikely that we'll get a retina screen on either MBA.
We'll know in a few days though!
the new chip will definitely run cooler and require less power but not enough to make a big enough difference. Retina takes a LOT more power. Go look at the different battery sizes in the various retina machines vs classic.
i just don't see how it would be practical without sacrificing weight or size.
the 13" MBA is already being "threatened" with redundancy with the 13" rMBP as it is. the 13: rMBP has a smaller footprint and only weighs .5 lb more...
i just don't see it happening this time around. especially on the 11" but probably not on the 13" either
but what do i know?