A computer is about a zillion times more useful to me than a car. And yet, would anyone call me crazy if I spend $2000 more than the minimum for a slightly faster, more comfortable and nicer looking car?
That said, I believe that there are few people that would pay that $2000 premium, because it would be difficult for the MBA to differentiate itself sufficiently from the competition, short of Ostrich leather and Swarovsky crystals (which only appeal to a very small clientele).
If Apple would offer an MBA with a Retina style display and otherwise decent specs (i7, 8GB, Sandy Bridge, 3G, min 256GB SSD), I would happily spend $3000. But Apple can not do this, because MacOS can not drive high resolutions (so: no 300dpi display), and the exclusive relationship with Intel does not exist any more (so: no Sandy Bridge this year).
Thus, the MBA will probably have similar specs as the Acer Timeline, which sells at about $800. Add $250 to upgrade the SSD, and $300 to make Apple's stockholders happy, and we are at $1300 (give or take $100), which constitute a roughly fair price point in my view. An Apple tax of $300-$400 is ok in my eyes, because it spares me virus scanners and gives me a decent, sturdy design (hopefully a boxy one).