The dense city is often lauded as a sustainable and desirable model, particularly given its limiting effect on travel and CO2 emissions and its positive impact on social ties. At the same time, as “barbecue effect” theorists have shown, when we consider the number of kilometers travelled within the framework of long-distance mobility, the mobility of people living outside of cities is, in fact, equal to that of inhabitants of city centers. Is one city model really more virtuous than another? What model do people want? What living environments for tomorrow’s lifestyles?