And we are much better at running an energy-efficient economy: energy use/real $ GDP has halved in the last century.
The trend may not continue. People might start to do much more air travel (which would require massive runway building). Global warming might increase the need for AC. But my intuition is that there is some limit to the amount of energy one person can consume.
[1] https://www.eia.gov/totalenergy/data/annual/pdf/sec1_13.pdf
