We have both cheap and high efficiency cells. We want to push the whole cost-performance curve so that the cheap cells get cheaper, the efficient cells get more efficient, and the cells in the sweet spot for any particular use get both cheaper and more efficient.

We also need new tech like flexible solar or window integrated PV to mature, and new financial ideas like selling battery integrated solar in africa like a cell phone contract to be developed.

We're past the stage of crazy inventors in the lab being the only player, now we need salesmen, marketers, engineers, manufacturers, tradesmen, architects, accountants and regulators to actually roll out this tech as widely and effectively as we can.