Protopage is really very impressive. With this, and Writely, and GMail, and Google Maps and so forth, the in-browser experience is becoming amazingly rich. There will be a viable Open Source desktop environment after all. And it will be called Firefox.
Interesting question… At present, more than half of the machines sold are laptops, because people are getting more and more mobile and they really want their data with them everywhere. Will we ever see a reversal of this trend, as less and less of our data is stored on our own machines and it becomes accessible from anywhere? Will we see a ‘desktop PC’ renaissance?