The dashboard crap is not relevant to the discussion. Once we have driver-less cars (and I assure you, teens and people 70+ NEED driver-less cars already, so they will come), then the industry will change.
Once that happens, then the industry will entirely change. There will become three basic kinds of vehicles:
1. Recreational vehicles that do not have a computer. Further segregated into speed, off-road, and specialty classes.
2. Cheap. Probably focused on low gas useage, low speed, simple transportation designed to get you to work and the store at a reasonable rate, all while you read, listen to music, or watch videos. Power, speed, appearance will pretty much be ignored here. You want to show off, pick a girl, you get yourself a recreational vehicle.
3. Cargo. People will still need to haul stuff. Minivans/SUV types for parents, trucks for workmen, the main difference will be whether the cargo area is designed for people or for goods, and if for people will it have a minibar stocked with high end liquor, or a Videobar stocked with cartoons.
The idea that the dashboard will become the all important feature only applies to Mommy-mobiles. It will be a relatively small portion of the market.