I think documents and hyperlinks are still relevant. Much of the content on the web is just formatted articles, which I wouldn’t mind receiving in plaintext and

I think documents and hyperlinks are still relevant. Much of the content on the web is just formatted articles, which I wouldn’t mind receiving in plaintext and formatting myself (and indeed many services, such as Instapaper and Readability, have functions for the very purpose of stripping and reformatting text online). I think that web apps will remain relevant as far as the eye can see However, there is definitely a clear distinction between document and application, even if they are currently transmitted using the same protocols; distinguishing them from each other would allow numerous usage optimizations for documents (at the very least) such as the visual links of Xanadu and the sole usage of compressed plain text.