For our collective future, I expect cars to become even more important than they are now. Typically, when travelling more than a few hundred metres, people will phone for an autonomous taxi (AT) which will collect them within minutes and then drive them safely, quickly, and economically to their precise destination. The taxi service will be 24/7 with most fares eventually being under 20 cents per mile.
In this collective future, nearly all car travel will be by AT because, nearly always, it will be the best and most economical way to travel. Most people will no longer need to be car owners or to use buses and/or trains to commute.
Rideshare will become an important part of AT travel and it should end nearly all road traffic congestion.