So just to fantasize for a bit,

Suppose fusion power becomes a thing, and after handwaiving some issues let's assume it can power everything indefinitely.

Does that make things like heating, cooling, travel, ocean desalination, bandwidth, AI, Bitcoin mining, permanently free?

Shouldn't all of humanity be homing in on that holy grail?

I read here and there that geothermal could be the next best thing. Maybe HN can say more on that.

(P.S. terrestrial fusion may also explain why nobody bothers to build Dyson spheres out there)