Think of new perspectives of the passengers and owners.
What would you do if you had a robotic chauffeur to take you wherever you wanted? Would you go places that you would not normally go to now? Cars drop you off at your destination and park themselves (maybe call you to agree to whatever the lot or garage, recharge station is charging)
SD-Cars make the driver the passenger... who will now be able to look out and see the roses... listen to an interactive on-the-raod tour. Read the billboards, notice that fruit stand etc. Former drivers will be asking "are we there yet?" Parents can truly interact with their kids on the road.
People that didn't travel as much due to health or medical reasons may be traveling more.
A lot more day planners, maps, review sites, etc. will probably interact more with the vehicle...