The future is looking extremely good for solar, considering that the cost of a sq m of PV panel is about the same for an LCD TV. There is far more room for economy of scale and new tech to drastically drop prices. Plus, installed capacity is still doubling faster than every 2 years.
It seems that PV systems are loosing their air with each upcoming quarter (not ever year). I will not be surprised to see the iSupply forecasting even lower growth by next quarter. As long as the cost per kW of solar energy will remain uncompetitive to that of the fossil based energy, the future is bleak for solar. The same goes to the other energy sources.