A recent Deutsche Bank report concludes that solar power has now reached grid parity, meaning that it costs the same as electricity from the power grid, in Italy and India (where the government's goal is 20GW of solar by 2022), and that by next year even more countries will reach parity.
The German bank has also increased its solar demand forecast for this year by 20% because of strong demand in places like India, the U.S., China (around 7 to 10 GW), the U.K. (around 1 to 2 GW), Germany and Italy (around 2 GW).
We've already written about how China is expected to become the world's biggest solar market this year (it already is the biggest producer). There's also progress with big concentrating solar farms, even though the big drop in solar PV prices has made them relatively less attractive than they used to be: The current biggest CSP plant has started operations in the UAE, and an even bigger solar CSP farm is under construction in the Mojave desert in the US.
For progress on solar's efficiency, check out: All solar efficiency breakthroughs on a single chart.