What about today's r/c, multi-rotor drones? They're already a clear threat in the "terrorist threat" department.The problem I have with driverless cars is the potential for terrorist use. No more need to talk someone into being a suicide car bomber. All you need it a laptop soon to be replaced with a cell phone.
You may have seen the film “The Last Chase” starring Lee Majors and Burgess Merideth...I foresee an even darker future when industry pressure (read lobbying/contributions/political pressure) pushes legislation to the point where human controlled vehicles will incur substantial insurance increases, with governmental requirements that would criminalize the reduction/removal of automated control functions.