I would argue that this is already happening. We have some new bike lanes, and a little less cars here in Berlin, at some places. And I do not suggest that ever

I would argue that this is already happening. We have some new bike lanes, and a little less cars here in Berlin, at some places. And I do not suggest that every development should be utopian. But why not give some utopies a try within a certain scope, e.g. a new district of one town? Worst thing that could happen is we sink a lot of money, and we have a not so nice quarter, but one could argue that exactly this happend with the conservative approach at the HafenCity. Best case is we recognize that this is actually the way we want to live, and it serve as a role model for future developments.