What if this fusion power thing actually pans out? The ITER is on track, and the scale model test in China earlier this year looked very promising. If we had access to (what from our perspective seems like) infinite clean energy what could we do with it? Transmute elements? Desalinize seawater? Drive a rotating magnetic field the size of the planet for wireless global electric power? What are the limits?
Fusion will be really useful as a baseline high density fuel source. But it's not a silver bullet. Also it's going to be a lot of fun when some grifter energy firm cuts costs, causes a steam explosion at their token test plant and the public realise that the reactor internals are in fact rather spicy even if it doesn't produce waste.