But is the $1,400 and $1,700 price tag really worth it to have a lighter fully capable OS. You still have to carry an external DVD drive for the air. Personally I cannot justify that cost and would rather have a complete all in one laptop like the 13" mbp for less. I never really got the point of the Air anyway. Laptops aren't that heavy to begin with and their mbp line is already super thin as it is. How much space are you really saving?
It depends on personal use. For those who are out and about all day with a laptop, it would make a large difference. Also, I'm sure that many MBA users would just leave the external DVD drive at home seeing as how CDs and DVDs nowadays are usually used only for music and movies and the odd software installation, but most data is pretty much transferred online or via USB.