Cars will die... it's a very slow process, but it is happening.
Car sales have been trending down for quite some time... add the fact that fewer teenagers bother with a driving license these days and you see that in 10 years time there will be much fewer of them on the roads.
I would have got rid of our car years ago, but my wife still sees the car as an essential (grew up in Canada, where you drive two blocks to see your neighbour).
We probably use it once or twice a week... typically to head somewhere and then go for a walk or to head somewhere for breakfast at the weekend. We also use it to go on holiday, as an alternative to flying...
I can't see a cargo bike being of much use for us, as we walk to the supermarket and shops. The car is a rather expensive to maintain luxury in our case, but at least it's one of those little cars that does 60 mpg and pays no road tax