If the day finally comes that the benefit of solar outweighs the cost, I suspect it’s going to be more in the form of thermoelectric ceramic roof tiles, myself. It’s not so much the sunlight itself that generates electricity with that, but the heat differential between the exposed exterior ceramic and the cool(er) underside. The aesthetics would be much improved, too. They haven’t proved prone to degrading with many hundreds of thousands of hours of test use.
That sounds interesting. The heat differential topic is one I’d like to know more about. Seems to me it could be utilized a lot more than it is.