As a win32 developer moving into web deveopment the last few years, I found the
web desktops based on extjs very interesting.
Coolite Desktop (broken)
Ex
I think they serve as purely tech demos, I don't see the web desktop getting any traction unless Google jumps on this and offers all their major apps (Google Office, Gmail, etc) as apps within a web desktop.
Of course the whole desktop methodology doesn't exactly fit the browser mentality very well.
NO.
Also, Uncanny valley of UI.
the desktop metaphor in a web browser is neat, but