nikhsub1, I see your point as to why you don't think the MBA will be successful. But I also think that what you consider impossible to deal with, or inconvenient do to the lack of certain ports, dvd drive, ect., others won't mind a bit.
Firewire port? Generally used for uploading digital video content, some external hard drives... maybe an older gen iPod? Personally, if I were on a video shoot, I'd bring my MBP, not the MBA. And I can load my music into the MBA easily as well?
As far as the DVD issue? I would have no problem ripping a DVD or 2, or downloading one from iTunes for commuter viewing, travel. I wouldn't expect it to be the absolute highest quality HD, nor would I need to put several on the smallish hard drive at the same time? It's easy enough to either throw a portable hard drive in my bag, or just swap them out on the hard drive as I go.
I think it's perfect for road warriors who aren't needing to do anything that requires a lot of ports/resources. For a business commuter, using it for email and Office would be perfect. With the added perk of having your music and a movie or 2 in such a compact space with a larger screen than comes on a portable DVD player or Touch.
The person who needs all the ports and power can opt for a MB or MBP depending on their needs, instead of a MBA. You'd be suprised how many don't really need much power from a laptop, but just the portability, basic functions, and a keyboard they can comfortably type on, (LCD that is easily viewed). I don't think anyone who is buying the MBA is using it as their sole computer.
Clearly, it's not meant for everyone. But for those who have a use for it? It's an awesome alternative to the MB or MBP. I think I just talked myself into buying one!
BTW: The beast is freakin' awesome!!!