There isn't much here that you wouldn't find in a wikipedia article, and this kindle single isn't much longer than that. I still had seven minutes left on the elliptical in the gym when I finished this. Jarvis tries to paint Gutenberg as the 15th century Steve Jobs, which is an interesting theory, but he doesn't back it up with much evidence - just a lot of 'Gutenberg did 'x'. JUST LIKE STEVE JOBS!'. The writing-style is reminiscent of a motivational speaker, which I also found a little annoying.
An interesting hypothesis, and one that I wouldn't mind reading about in book-length form, by a person with better writing skills.