But, and this I can tell absolutely now because I now have seen screenshots, if this is all Nautilus isn't that fine like other file managers are. And it didn't really include new features expect a kind of notes for url's and the url-simplification itself. I didn't say it had to do it the same way. If someone can come up with a better way to capture function of the tree metaphor with a nicer physical interface, I'm all for it. A hammer is not a good screwdriver.
Different people work differently and do different things.
If there's no tree view and Nautilus is really useful, I'll probably role my own extention to Nautilus. Just don't be disappointed if others chose to walk a different path. Both projects were inspired by the Xerox PARC GUI projects. If someone wants to use that design philosophy on a Unix machine, then they are free to do so. That includes understanding its 30 years of history.