To the contrary, people will still need to get around. Economic opportunity will be created. And those opportunities will tend towards more environmentally benign ways of getting around. And they will have more local benefits. For example, it has been estimated that estimated that investment in public transport yields more than three times the number of jobs over investment in roads.
More public transport means more jobs for drivers, planners, maintenance staff.
And bikes mean business, too. Bike building, bike fashions and bike paths. And for the truly car addicted - there will be methadone. Car co-ops and rental agencies will give the fix for those heavy hauls or weekend escapes. We need to stop planning our cities around a consumer product in the name of progress.