I interpreted the "1% improvements" to be exactly that effect of cost dropping like a rock (economic efficiency), not about the energy conversion efficiency.

PV entrepreneurs are the real heroes of the climate movement, IMHO. They figured out markets that would have enough demand to push forward with developing the tech. Germany's government is a major hero too, they pushed the tech forward so far at a crucial time. Then China took up the mantle.

Both supply and demand need to build together for the industry to grow. Government subsidies played a huge role in accelerating this, and will have paid for themselves so many times over. We're going to live in a world of super-cheap technology thanks to the modest tax-cut-based investments of governments the world over.

It does suck that so many powerful people were against the obvious-in-retrospect good idea of solar PV, but I'd love to focus on all the heroes that pushed through anyway and made it happen. They deserve a lot of thanks!