As always, economics is what's driving the incredible growth in solar PV. Get it cheap enough and people will buy it. Soon it's expected to have cost parity with fossil generation. The outstanding question remains though: How to balance solar supply (when the sun shines) with customer demand (not necessarily aligned).
By mid-century, the sun could be the largest source of energy and help reign in global warming by preventing the release of billions of tons of carbon dioxide emissions, according to a new report from the International Energy Agency.