Not just that even more mundane stuff becomes much easier if you have more energy - clean water (desalination), trash (vaporize & collect fractions), raw materi

Not just that even more mundane stuff becomes much easier if you have more energy - clean water (desalination), trash (vaporize & collect fractions), raw materials (can trade energy for lower input concentration in ore), polution & greenhouse gases (capture back from th atmosphere and convert to something usable or inert). All this becomes relatively easy if you have a lot of cheap power. And you would not get it just by power saving and eficiency improvements, only with research and building of new sources.