Leave it to Adam Lisagor to provide some real perspective:
Of course, for the heavy lifting I do in post-production, I’m tied to my Mac Pro, but for any of the heavy thinking, I’m just in love with the notion of using the Air as a shell for all my crucial data, relying on Lion working with Dropbox, iOS 5 and iCloud to make a real advance towards the cloud-based computing that Steve [Jobs] foretold way back before he rejoined Apple. It’s a bit of a conceptual hurdle to those of us who grew up daisy-chaining Firewire drives or lugging around Zip disks, but I think I’m getting the hang of it. One instance, many screens. It’s still an early phase of a whole new way of thinking about computing. I feel like the word “computer” is not going to be in the lexicon much longer, and that’s pretty exciting.