A robotic cab doesn't NEED a smaller engine. It can get by with a much smaller engine. A robotic cab doesn't need a driver. Or a front seat for him. Or a po

A robotic cab doesn't NEED a smaller engine. It can get by with a much smaller engine. A robotic cab doesn't need a driver. Or a front seat for him. Or a powerful engine to suit his lead foot. A personal robotic car will be the same size. But a lot fewer people will need them when they can call cabs for less money per mile. Especially in urban areas where storing cars is a big expense. Frankly, I don't see how public transportation will be able to compete. Its too slow and inconvenient and completely unavailable after certain times. In other words, the bullet train is doubling down on old technology that is highly inflexible and a big time waster. But, hey, maybe people like going to Bakersfield.