- Most of them will be designed for 2-3 people. Small and cute-looking on the outside, very spacious on the inside - see the google car.
- No driving wheel, dashboard, pedals, storage compartments to keep (and forget) stuff. Most people who buy a car will want to be able to drive it, for taxis - not driving it is the whole idea.
- All the above stuff will be replaced with a huge curved screen. Almost all people will work, watch movies and browse the net while commuting. The infotainment center will be the most important part of the whole experience. This is why Apple and Google want to be in the game.
- If you've ever used a rented city bicycle, notice how it's parts are completely different than the regular bikes. The same will be for taxis. You would not be able to steal the battery pack, motor, etc. and put them in a regular car. And if you don't want your expensive 300kWh battery pack to get stolen - maybe it's not a good idea to let complete strangers get in your car and take it in the middle of nowhere.
- The interior will be designed for easy cleaning and maintenance. Try splitting a cup of coffee in someone's TESLA and see how that goes.
Logistics for taxis will also be completely different than for owned cars that also act as taxis
- A taxi can take you to another city, hundreds of miles away and stay and work there, no need to go back.
- When not needed, taxis can gather in huge tightly packed parking lots - close to places where demand is expected.
- To minimize idle time taxis will use battery swapping instead of recharging.
- You will be able to order a coffee, breakfast, the latest newspaper and your groceries to arrive in your taxi. You can leave and take your laundry. Going hiking? Just order the equipment and food you'll need 15 minutes before departing. Don't be surprised if Amazon decides to enter this business.