Came across an interesting thing tonight: YouOS. A portable OS that "runs" in a web browser. All of your apps and data are available by logging in, the whole thing runs using JavaScript and looks a lot like earlier GUI OS's (MAC, Workbench, etc). I am even writing this post in the web browser that I ran from YouOS while running it in my firefox browser...

Are we finally getting to see the web as an actual platform for software? With YouOS they have like 700+ apps available, and of course none of them have to be downloaded or installed... Although it isnt perfect, I must say I am rather impressed with how well YouOS is dealt with, and the fact that I could view videos in it without using as much CPU time as a regular firefox media player stream would use under vista...
(BTW, when I say apps dont have to be downloaded, I mean they do download, but using the server as though it were a hard drive. IE not clicking on a "download now" type thing, they just start up after the app has been transfered after clicking it...)