Power users have grown up, but we'll see in the next few years whether or not the typical user will miss those metaphors or not. They seems to be taking the Windows 8 switch from the desktop ok.
I must say, I really appreciate the easy transition that Microsoft takes. I remember trying to install my dad's old DOS based computer games on our NT based PC and being pleasantly surprised when I realized how painless the process was. Good to see they're repeating the practice.