What will come with the approaching boom of guilt-free energy is public support for doing more things with more energy, and instead of stagnated per-capita energy use a return to more-than-linear energy usage growth.

With that you get flying cars, space tourism, AI, cities in deserts with free water through desalination, better indoor climates with freer ventilation with the outside, cities skies free of ICE smog and probably a whole lot of things which are hard to imagine.

I hope you are right. My fear is that it could allow unrestricted limits to tear down the rest of nature.

Alternatively, it could mean that we would no longer need to do that as a lot of materials that are restricted by energy costs become viable. If energy is almost free you can extract a lot of trace materials from almost anywhere.