Many people are failing to appreciate the "tesla for the skies" model that is coming. Uber is actively pursuing the acquisition of companies like Lilium. Long term, roads aren't a great solution to increasing populations. The Ubers of the sky which land in your front yard or the top of your building and whisk you anywhere within 200-300 miles is coming... fast. And by making the eletric VTOL aircraft autonomous with waypoints, no one has to be a pilot. You simply hail a plane with your app, hop in, fly to your destination and depart. Many companies are testing full-size models like Lilium... for example, http://www.jobyaviation.com/. No one has carried a human passenger yet, and none with autonomous waypoint flying. But soon... within a year.