in theory it can lead to better organized more fluid traffic with less pollution and way way fewer traffic jams that resolve exponentially faster.
you can also relax more compared to driving. basically it's like getting up to a few hours in extra each day to watch some video read listen to music relax sleep whatever.
self driving cars can drop you off near where you want to be and go find a parking place on their own, then you can call them from your phone much like how you order a taxi except it's easier it will find you by gps not words.
it's like having your own personal driver for free.
two things i await very much: self driving cars at least on highways but cities would be even better and electric cars retaking the roads completely from the gas guzzlers.