Yesterday I saw a documentary where it was said that nuclear plants was not the answer: we need 10 000 plants to sustain the amount of energy we currently are consuming - and with that many plants we would drain the world’s uranium resources in 2 decades.
I believe you are right that there is a technological sollution to this - it could be cold fusion, it could be solar power, but my point is that the transition will come gradually, we won’t end up in a mad max scenario over night.