If we can get fusion going, there's going to be much less of a need to make the world a solar panel.
I don't know if that's true. I don't think we're ever going to have one primary from of energy generation again, unless we build an electron pump or something. It's a lot harder to get a fusion reactor built than a solar panel or a wind turbine, and people aren't about to install a fusion reactor in their house in the same way they can put solar panel on their roof or a turbine in their backyard.
Plus, we aren't out of the woods as far as "is this even possible" with self-sustaining fusion yet, so I'd like to hope that the survival of our civilization doesn't depend on it ;).