The power of it is being able to easily take it wherever you want. Right now I have a very powerful Dell Inpiron 9400, and it is heavy. I only take it on major trips. With the Mac Air, I can easily take it with me whenever I need it without a second thought. Also, I want to use if for remote coding, and with sbcl/emacs/slime, it is plenty powerful.
Killer feature: extreme portablility with very good power.
And.. It is simply beautiful. It looks like a dream from a futuristic scifi movie. In fact, this may be the most beautiful computer to date - but I have to see it in person to confirm. (I still remember going crazy over the Next computer when it came out)
Yes, it's portable, but I'm kinda curious about how it would be to work with it over long periods of time. Considering how thin it is, I would think that there would be a pretty serious learning curve when it comes to typing. If, in fact, the keyboard is implemented so that you don't feel like you're typing on the tabletop, this will probably be a winner due to the weight savings. I could care less if they make it any smaller, if the regular MacBook only weighed a couple pounds, I would probably own one right now.
Yes, I have that dell too, and it is powerful and heavy. But, for 1800, you can buy that, and the Asus Eee PC, so you can have them both, one very powerful machine, and one very portable one, for even cheaper than the Mac air.
The Eee is ugly, slow, and gimpped, so I wouldn't consider that a very good option. Unless all you do is surf the web and check email (and absolutely nothing else).
Killer feature: extreme portablility with very good power.
And.. It is simply beautiful. It looks like a dream from a futuristic scifi movie. In fact, this may be the most beautiful computer to date - but I have to see it in person to confirm. (I still remember going crazy over the Next computer when it came out)