Well, the dust has settled a bit after the initial excitement regarding Tesla's $2,600,000,000 purchase of Solar City. (Somehow, writing it out with all 8 zeroes gives a better picture of the money involved. As Senator Everett Dirksen never actually said, "A billion here and a billion there, and pretty soon you're talking about real money.")
Of course, there has been significant kerfluffle about the fact that Elon Musk is founder and general grand poo-bah of both companies. However, it seems that settled down pretty quickly, primarily because Tesla's shareholders are still sitting pretty.
Besides, it's Elon-freakin-Musk. What could go wrong? (insert smirk here)
So, what does it all really mean for renewable energy? Not much.
Why? I'll tell you in two words: