Re: windscreen wipers?
"Although I expect commercial self-driving cars will also have windshield wipers, to let the humans in the car see out."
Why even have windows?
Being unable to see outside the vehicle will leave the occupants relaxed and they won't have to be stressed out that their vehicle has left the road and is about to drive off a hovercraft ramp directly into the water as directed by their GPS.
What's the use of upsetting and stressing people out needlessly as they generally won't have time to react to an emergency situation in the case their car goes off the rails so to speak..