By analyzing this graph it is explaining the growth of the cars with the self driving feature. When you think about it, in four years we will have more then 8 million cars that have the capability of driving without an operator. Is this for the better or worst, the link bellow has an article explaining all the pros and cons.

http://www.businessinsider.com/report-10-million-self-driving-cars-will-be-on-the-road-by-2020-2015-5-6