I'd say that the cost of efficient PV array systems is a real issue which currently exists. Unfortunately the article doesn't say much about the costs of these

I'd say that the cost of efficient PV array systems is a real issue which currently exists. Unfortunately the article doesn't say much about the costs of these new cells. In my area (Latitude 20 deg. N.) solar begins paying for itself after only a couple, or more, years depending on the type of system. Obviously, one wouldn't choose to power heavy inductive load appliances with solar power, but for small items such as electronics and lighting, even refrigeration, solar makes more sense than paying $0.47 per KWh. Then there are reliability issues inherent to municipal power grids... When my neighbors experience a power outage my home is not affected, and to me this alone is worth the price I paid for my stand-alone solar power system.