Got an rMBP, the retina isn't all that. Remember the 3011 dell 30" monitor from a few years ago, it was called 'ultrasharp' and had 84 pixels per inch. The Macbook Air is in the 120s range, it really is plenty for every day computing.
Retina is certainly nicer, but anything above 100 seems like a bonus to me. It sucks the airs didn't at least get 1920 x 1200, in my opinion, with layered batteries, butterfly keys and a force touchpad. You could squeeze in a lot more battery or just make it thinner, that way.
But it's still an incredible device imo. Very solid performance. I chose the rMBP because I needed 8gb and a faster CPU. Getting 8gb and an i7 would've put the air around the price of a rMBP, and then a nicer GPU/screen and better resale value on the rMBP won out. But if I didn't need this thing for work, I'd definitely go MBA 8GB over any other Mac, 2014 if possible (sweet battery and even cheaper. Just incredible value).
I feel at the next release though, a Skylake rMB might be a better purchase. Especially if they do a 14" rMB the size of the 13" MBA, but thinner and retina. I hope they drop the price by $100, like how they dropped the MBA from $1800 to $1000 in the past 7 years.