Autonomous cars will spread around the world as fast as Facebook did. May be limited only by how fast we can manufacture them. One main reason is that they will bring more revenue to the owner than it costs to buy one. The car will drive itself for Uber or another better company. Fleet operators will be richer than car manufacturers.
The third world countries will be where people still drive their cars, and it will be seen as the most wasteful use of one’s time. Except for racing and adventure driving which will be highly regulated.
Some people in India told me, It will not happen in India so fast. For me, it is the equivalent of landline companies not assuming that mobile phones will spread so quickly. Wait till countries like India that has a vast reserve of money, start building roads dedicated to only for autonomous cars.