Steve Crandall:

Everyone is talking about fully autonomous cars and dreaming about the future these days. I’ll claim we’ll see much more automation, but full autonomy is some way in the future. For now fully autonomous vehicles are the gyrocopters and jet packs of today. One can imagine several transportation as a service and transportation on demand.
 To think about costs you have to consider specific scenarios, but a very long lasting platform that forms the basis for a service could be interesting. A fun area of speculation even if Apple isn’t doing it – after all, where’s their large screen TV. Potentially this ‘feels’ more interesting than Uber or Tesla in their current form.