I do a lot of work in Google Apps and Web-based e-mail, so Chromebooks are well suited to the bulk of what I do. Instant messaging works over the Web, too. Offline access to Google Docs is still somewhere between broken and primitive, though, so a network connection–that bugaboo of cloud computing–remains essential for me. That means working on trains and subways is impractical for me.
But the direction is clear: cloud computing is tremendously important, even when it exists in some hybrid state such as Dropbox’s file-sync service that also marries online services with local computing.