Lego Skyscrapers + Decentralized City

If driverless modular rooms become a reality, we'll need to stack vertically in skyscrapers within cities. 

On-demand driverless rooms could offer the option of going to sleep in one city and waking up in another. The driverless rooms and "parking" towers could leverage blockchain technology and remove the human landlord. The driverless rooms could own and manage themselves, and the rental fees could be enough to cover operating costs but at zero profit.