Let me put this way: it was a good display when the current generation MBA was released, back in 2010. But then IPS displays were only available in the iPhone and in the iPad, and only the iPhone was retina. Time has passed.
Now, look at the offerings. Several ultrabooks in the Windows world which sell for a lower price than the MBA have IPS displays with higher resolutions. And these ultrabooks will adopt retina-like resolutions in the following months, following the release of Haswell.
If Apple keeps the current displays in the MBAs, they'll be poor quality by the end of the year. They'll only be matched by budget Windows laptops. It's not a display for a US$ 999+ machine anymore.
Ouch, then I guess the MBA is not for me. I like good displays. Always. It's why I didn't get a iPad mini. I can't go back.