If they can figure out how to really take advantage of economies of scale, and drive the costs down quite a lot -- the desirability of car ownership will drop dramatically.
Everyone I know under 40yo already professes to hate driving and hate car ownership.
Owning a car and living somewhere you have to use it for day to day everything is tedious. But the option of one for the weekend, trips out of town, into nature is ultra valuable, enough so that it's worth it to have a car sitting doing nothing during the week for us, even in a well connected large city, in a walkable area.
At present or I suspect future costs, any kind of taxi for an out of town trip (without any rail option) of 50-100 miles is way too expensive to consider, we'd sooner hire a car, if it was slicker and more convenient. But hiring a car anywhere but an airport terminal needs a trip to the hire place, and needs to start and finish when they're open to avoid spending an extra day or two of hire. Plus time taken on paperwork and insurance faff could easily be an hour.
Everyone I know under 40yo already professes to hate driving and hate car ownership.