Why does the tech industry focus on self-driving cars so much? It's absolutely never going to happen, ever. The world would be much better off if we converted our roads to a rail/streetcar system and drop the personal car concept entirely. The hype around this is worse than VR.
Sure, they only work on the highway, but that is still a large amount of driving time.
Replacing 50% of driving hours is still a world changing revolutionary benefit.