I suspect that as computer driving takes over, there is less need to own any of the "appliance" vehicles, for example camry, metro, cavalier, accord, etc. It will be much cheaper on a total owning and operating cost to order up the computer driven taxi as needed. No car = no taxes, no financing, no insurance, no tickets. These fixed costs get distributed to hundreds of passengers per day, which maximizes the capital utilization. The computer taxi companies will want to buy fuel efficient reliable appliance cars, either hybrid or all electric. Since the passenger no longer "owns" the vehicle, there will no longer be the psychological association of the vehicle being a fashion and personal statement.
People will continue to purchase for themselves the specialty vehicles: trucks, sportscars, vans for road trips, and expensive luxury cars to show off wealth doesn't need to save money using cheap computer driven taxis. We might now be living in the golden age of sedan design, power (V6 Camry makes 268hp!) and variability. But as that gives way to computer driven taxis that cost a couple bucks per trip across town (right to your CC, Google Wallet, or Bitcoin Wallet) the specialty vehicles will get more extravagant. Bigger more luxurious trucks with bigger engines and more design choices, more musclecars with crazier performance, and more bling to the luxury sedan.