Yeah, modern technology takes a long time before it actually solves basic problems because it's rarely universally distributed. For me, the primary appeal of solar or wind power is that, with technology, I can use them to produce energy for my use. In practical terms today, that means I have a small panel that will charge my phone and a 12v volt lead acid battery that I can use for light and to run a small computer or tiny tv. So, it's for emergencies; but, if they could make solar panels a lot more efficient, I could run more. My building currently has panels connected to the grid.
Achieving fusion may give us free energy, but I doubt that it'll be given away freely or even at less than energy costs now. I would like energy independence. Food independence would be great toe. But, big business doesn't want those things at all. They'll only do what is profitable, and they'll demand to be taxpayer subsidized.