But wouldn't it be awesome to drag a window generated within a webapp and toss it some place onto your desktop? (to the degree that the browser is just an extension of the OS -- kinda like a file explorer with more features)
It's these kind of intuitive things that I love. The only problem is being able to guess what is intuitive to whom. Else you'll end up with a ton of features that no one ever uses (read: waste of money).