http://www.vox.com/2016/4/18/11415510/solar-power-costs-inno...
Suggesting that costs are not falling fast enough to overcome value deflation. Seems quite US-focussed though. The numbers in the two articles don't seem directly comparable.
For the near term, financial engineers have not done solar any favors with recent "yieldco" abuses.[1] Though with value deflation, financial innovation and regulatory protection may not be able to save solar.
When enough of the worlds billionaires and other powerful riffraff get spooked by climate change, you'll see carbon taxes imposed. And countries like China and India will simply phase out burning coal.