There is no urban future, despite those who dream smart cities. The reason why it that dense urban areas can't evolve and consume MUCH MORE in the modern world

There is no urban future, despite those who dream smart cities. The reason why it that dense urban areas can't evolve and consume MUCH MORE in the modern world than sparse areas even if most deny it and do not even try to compute the raw materials and energy an urban vs sparse area consume. The future could be or a mass genocide to lower quickly earth population or an "urbanized" world of single family homes and sheds. That's why all who knows push "urban air mobility" which can't be in dense areas and can't be "collective" as well, because it's a way to reduce the need of infrastructure again and again. We need a cluster world, not a mainframe one.