Car residual prices are collapsing, based on an alert that crossed my desk last week, and it struck me that we haven’t considered much the secondary impacts of having self-driving cars, and the changes that will result from turning automobiles into four-wheeled elevators. Many industry players are treating self-driving cars much like cruise control: a nice-to-have option that will make driving much easier and safer. There are a lot of industries that will be impacted by this, though, both positively and negatively.