Having a car come pick me up and take me to/from work would be great, and with no human to pay would be cheaper than owning a car for that purpose. But the family car packed with backpacks, jackets, sports gear, etc is gonna make owning at least one car per family that can afford it a reality for a long time. But self driving taxis will revolutionize how we get places and get stuff delivered, and ultimately for the better.