> 2) Lower the barrier to attending events, restaurants, etc in urban areas where parking is an issue. (if you car can go park itself a couple of miles away and you can phone it up when you want to go home, win)

It lowers the barrier on travel in another way too. Put a comfortable bed in the self driving car and anywhere within 8 hours drive is now a night's sleep away. Weekend tourism would be a lot more fun that way.