I know we Americans just love to own cars, what with the rapid depreciation, constant maintenance and massive storage requirements. Who could resist? But isn't the promise of self driving vehicles that we don't <i>all</i> need to own, maintain and operate a 4000lb machine? I know it's hard to resist dropping the $30k, $40k or even $50k and paying that monthly insurance we all love. But wouldn't it be better if we could just summon whatever vehicle we need for the hour and then get on with our lives? And more importantly, don't we all want the benefits that will come from having mostly robo-cars on the road - such as fewer accidents and injuries, less traffic, faster trips and more parking?