Thinking a little further. In the future, we will have autonomous cars, and a user will probably not &quot;own&quot; the car, but will simply order it. And the user can specify if (s)he would like to share their ride. This car can easily have additional functions, for example package-delivery (a package is nothing more than a shared ride with a non-human passenger). Of course the logistics will be run from a central computer system. Perhaps this could be a more cost-effective solution to the whole package-delivery problem (?)