In the future, I hope this becomes a thing. As cars become more commodotised and self driving taxis can be ordered easily maybe there'll be competing mass fleet

In the future, I hope this becomes a thing. As cars become more commodotised and self driving taxis can be ordered easily maybe there'll be competing mass fleets? Or have a "car-cabin-without-engine-and-wheels" and treat it like a packet on a network of trains and "skateboard car platforms".