Interesting, but hardly a "surprisingly easy" source of power. Mining the Moon is hardly "Easy," but is trivial compared to controlled fusion. To the best of my knowledge nobody has made any progress towards practical sustained fusion in the last 40 years. The only working fusion reactor you are ever likely to see is about 150 million kilometers away.

But you know, I'm going to do some reading on piezoelectric ... sidewalks are stupid ... Freeways ...