Wind's not doing terribly, but in the last decade solar has seen something like a 7fold increase in prevalence while wind has only seen closer to a doubling.

There's a chicken and egg problem here. These products are on learning curves. The more you sell, the cheaper they get, the more they sell. Solar has a killer feature -- it's ridiculous modularity. It scales from facilities that are acres and acres large all the way down to the roof of a van. That scalability has been a big part of driving demand for PVs beyond anyone's predictions.

Wind needs some help. Again, these energy sources are ridiculously complementary and we need both for the future. I want to see wind keeping pace with solar PV. If it can do that, natural gas is going to be wiped out by them.