A Fascinating Glimpse at How We'll All Carpool in 2027

Carmakers have always designed vehicles for individual drivers and families, not groups of strangers. That could pose a problem going forward. In fact, it already has. Look at the tensions that arose when services like Uber transformed personal rides into public transport. The advent of self-driving cars--vehicles for which codified user interfaces and social norms have yet to emerge--will only complicate matters further.