More like step out. The biggest issue with housing today is lack of supply, and the biggest cause of that is the restriction on development imposed by planning regulation. It shouldn't be a 20 minute walk from a detached house to downtown San Francisco. It's a nice idea, but every house like that could be part of an apartment building housing 10 times as many people. US cities have jobs, entertainment, amenities and services, so demand is always going to be high; supply has to be allowed to meet it.