One problem is CORS creating a firewall around every web page. Another problem is copyright, showing someone else's work on your web page. Fair use would have t

One problem is CORS creating a firewall around every web page. Another problem is copyright, showing someone else's work on your web page. Fair use would have to be expended to showing parts of a document. Wikipedia did something like this where you can see content when hovering over a link ... But I think what the old guy is talking about is actually showing a visual graph how documents and text are linked together. We humans are good at scanning text. So I think something like this would work well in a search engine, where instead of getting a list of links, you get a visual graph of interlinked documents, that makes it faster to explore different branches and find what you are looking for.