Eventually when Zip cars (rent by the hour, parked in neighborhoods) take over. And the prices for that become low enough. Then private car ownership decreases and there won't be parking problems.
After all, most private cars simply take up space being parked, wasting space...for the majority of time. They're not used.
Much how like Citibike has solved a transport problem with bikes.
It'll be generational...younger folks, trained on the Citibike model, will be happy to rent cars like Zip by the hour/day/week and ditch the private car 1970's era notion.