FYI: The AlphaGo documentary is now on Netflix.
https://www.youtube.com/watch?v=vHJ2BnFx8Ak
Favorite line from it: "AI blew the gates of the Go palace open. And we realized there was no one inside."
Another interesting thought was when one of the developers gets asked why bother to clone AlphaGo when AlphaGo already exists, he says something like "Was it pointless for China to develop the atomic bomb even though the USA already had?"