Give them a backlit keyboard and I'm sold.
The Airs are lovely kit but my 2009 MacBook Pro still beats them on one important thing for me, a backlit keyboard. Fix that and I'll consider them for a future upgrade - I do not want to buy another laptop without the back lighting its just so useful.
The Airs are the future of laptops, lightweight, small, good processors, unibody solid metal build (imagine what the Liquidmetal version would be like!) and SSDs.