It’s true today that you can easily drive your entire home on solar power, but only if you live in a sunny country. If I was, I would install them immediately. They will pay back in like 5 years and after that, energy costs are zero.
I look forward to them becoming smaller and more efficient. In the future, we may be able to have glass that is made of solar panels, which means entire skyscraper buildings can charge their power continuously from the sun.