I compare Ted Nelson to Alan Kay in the continuum of visionaries. They both have and have had far-seeing, inspirational, empowering visions of applied computer technology. They are both, of course, incredibly quotable, even outside IT.

Ted Nelson futzed around and, mostly after the fact, other people discovered that the web was kinda sorta really close to Xanadu, but that it would be really awesome if it had been designed with that vision in mind.

Whereas Alan Kay followed through on predicting the future by inventing it.

I'm still astonished that, even with the backing of Autodesk, we don't even have transclusion as part of the web.