Levandowski already got his money. Waymo could sue him, but what are the damages? Google isn't selling anything, so they can't show impact on their sales volume. (Neither is Uber. Uber's venture into self-driving is probably more to pump up the valuation than to provide a real service, anyway.)
I'm beginning to think that self-driving will be a feature that comes from auto parts companies. You need sensors and actuators, which come from auto parts companies. You need dashboard units, which come from auto parts companies. You need a compute unit, which is just a ruggedized computer packaged for automotive conditions, something that comes from auto parts companies. You need software, which may come from a number of sources. This may not be all that disruptive a technology.