Demand is a no one-dimensional entity though unlike what you'll see in a macroeconomics report. The demand for smartphones in 1900 was precisely 0, for example. What happens is that our consumption will spread out and decrease in other areas, which puts some pressure on those industries to compete. Americans spend less and less on food now both because other things take up more of the monthly budget as well as cheap food options being available. Yet Belgians spend many times more / month on food and less on rent compared to Americans. Consumption also is dampened by taxation (pretty consistent in MMT and is probably closer to how things work under a reserve currency country).