Small correction: Google didn't "map all the world's roads using cameras and a mechanical turk, destroying billions in market cap for map data providers." That

Small correction: Google didn't "map all the world's roads using cameras and a mechanical turk, destroying billions in market cap for map data providers." That is more than a stretch. They mapped SOME of the roads in the US, augmenting existing TIGER data from the US government, and used it in place of TeleAtlas. The "new" data is pretty bad, so I use Bing for directions because of it. They still rely on TeleAtlas (one of the map data providers they "destroyed") for almost every other country.