No major automaker will produce self-driving cars because self-driving cars greatly reduce the need for private car ownership. A two-car family might be able to manage with a single car if that car can drive itself to pick up individuals. Groups could pool their money to buy a single car the same way that fractional ownership of jets happens today but on a mass scale. The number of cars parked unused could go down substantially. Self-driving cars are a huge benefit for society and cities especially but a disaster for car companies.