I believe that in this digital age it is important for us as designers to know how movable type came about. The documentary was pretty cool, the whole time I kept thinking about how much we take for granted. In the documentary Stephen Fry says that it must have taken Gutenberg over a year just to cast all the letters for his Bible. Today a person could possibly type that much in a single day.
Another thing to take into consideration is the impact that Gutenberg's invention had on our civilization, and the power it posses.