Don't underestimate Elon - he puts large objects into space. The secret sauce is coming when full level 5 is deployed and you can run your own Uber company - without needing to drive anyone anywhere. That is where the key card comes in. It will drive to a passenger and they will unlock with their card that was sent to them by "Tesla Uber" - or they just use their phone to unlock. If your car could pay for the car payment - and you could use it anytime you wanted - this is the big shift that will change the car industry IMHO.