A regular (15") MBP or a 13" MacBook doesn't work well in bed? It would seem to me that for the money, either of them offers much more in other features than the MBA due to their additional ports, built-in optical drive, etc. If I were looking for a laptop that I would be able to use primarily in bed I don't think I'd be eyeing an MBA, I'd be looking at either a MBP or a MacBook. The impression I'm getting about the MBA is that it's really primarily designed for the person who will be carrying it around, day after day or on trips, and therefore in order to get that ultra-thinness and light weight, Apple sacrificed a few features....
But, yes, to each his/her own and what one person perceives as a "need" another dismisses, or vice-versa. Some purchasers will indeed have a real need for this new machine, others may not but can still justify it to themselves anyway, and still others don't care about genuine or perceived "need," they just want the newest thing on Apple's block.....
(That said, I'm still trying to figure out how I can truly justify purchasing an MBA for myself...!!!)
Yes I have a new 2.2 with 4G of ram but, if i walk to the livingroom my hand sometimes gets stiff and the macboook is a bit heavy for me, anything to lighten the load