Well, I don't know.
However, to ease your conscience, there are a couple of people who believe that the 2011 mba is going to suck compared to the one of 2010 *cough* Scottsdale *cough*.
But I don't know, say you turned in your old MBA, would Apple get to sell it again, seeing as there would now be a newer version that isn't used already.
For some reason I hope not, 'cause I like to rub it in, also, the MBA you already got is sweet, so you should just be happy with what you got.
It sounds like there is going to be a tradeoff with the new MBA, better processor but instead a worse graphics processing unit, and some arguing that it would be a huge hit in graphics performance, and some arguing it might not be there at all or only slightly.
But yeah, at least you're not like my friend from school, who bought the new MBP 1 week before the 2011 version came out