Also recommended: "Lo and behold! Reveries of the connected world" by Werner Herzog.
It seemed like the director had no idea what he was talking about and a lot of the interviewees were non technical people that said things that made no sense (actually no sense - indistinguishable from words strung together to sound profound that were actually meaningless).
On first viewing, I too felt it was incomprehensible wordsoup in some sense - but upon learning more about Nelson and the history and context around which his ideas were developed, I've grown to find this interview almost magical.