I'm optimistic that the rise in geothermal will be astronomical once it gets off the ground. Both advanced and more simple conventional for district heating.
We're at most 10 years from the confidence in oil and gas investments being completely shattered. A lot of the investors and engineers will seek out opportunities where they can apply their competence. Geothermal is a good fit. Whoever captures the market first will have the most to gain, so once they see it's even remotely possible there will be a race.
I suspect politicians in countries with oil/gas-development in northern regions will start subsidizing this as well, both to attract voters from workers in that sector, and to help them establish a new competitive industry that they can replace their oil and gas exports with.
> So the revolution is coming, in my opinion.
Yes and: The nascent thermal batteries (box of hot rocks) and advanced geothermal power generation are just now crossing the chasm.
Both tech stacks have been proven, have financing, and initial customers.
And now they're jumping on to the cost learning curve.
Roughly, thermal tech today is where solar and batteries were in the 2000s.
The will be huge because 1/2 of energy consumption ends up as heat. So skip all the middle steps.