A self driving car will be used by a "terrorist" as a car bomb which will result in them being outlawed. This act will be carried out by agents for traditional oil based car companies to protect their interests.
Air planes weren't outlawed and neither was religion.
Better prediction; if you thought the internet caught on fast, look at electric vehicles (sure they aren't 'there' yet but they are close & popular(trendy)). Now take an electric or even gas powered vehicle; and let-it-drive-itself. This will be wildfire to the public once it's pronounced safe and legal.