I'm so happy to see this idea starting to get mainstream attention. I predict that in 50-100 years we'll look back on the age of the automobile as one of the biggest mistakes in urban planning. Automobiles are dangerous, kill thousands of people every year, contribute significantly to pollution, and cause health problems by discouraging physical activity. They're expensive, inefficient, and cause more harm than good…
The idyllic dream of vendors lugging their wares through the subway and city streets every day... When construction companies hire armies of people to walk individual I-beams through the city for every project... Where I get to haul my garbage a dozen blocks to the nearest accessible trash pickup location... In the end you still need roads. You don't get to convert all of that space into a park even if you ban cars.
There are significant benefits to this approach other than not having to use roads, but of course the tech isn’t there yet