> to prevent the same problem that happened when Jobs visited PARC and walked away with the idea of "we need to build computers with the desktop metaphor", without understanding at all that it was always meant to be about authoring and sharing, not about the visual metaphors

Can you expand on this, or share some links so I can learn about it? I've not heard the story framed like this before. I'm interested to learn "what we missed out on" as a result of "visual metaphors" becoming overemphasised in the public mind.