Our desire to have awesome stuff and amazing experiences expands to fit the space available. People compete for social status, and they don't want to miss out on whatever's new and exciting. There's an unlimited amount of resources that we could spend on medical research (curing every medical condition, including shortness, cognitive impairments and ageing, plus enhancements/transhumanism), climate engineering/geoengineering/megastructures, space exploration/tourism/real estate and other areas of scientific research, and most of this is going to happen as a result of private-sector employees exercising their consumer purchasing power. We're curious and productive creatures; I don't think a large proportion of us are ever going to just stop and make do with whatever the state of the art was at the time.