Electricity here in Los Angeles is 17.8 cents per kilowatt hour (kWh). Not far away, Mexicans get solar electric for one-tenth the price. And by 2019, the price could drop to 1¢/kWh.
Soon we're going to have to confront new questions as solar power costs less than anything seriously considered before, and will offer new opportunities never thought of before. What will we do with all of this cheap energy? How do we move from fossil systems toward solar sources without destroying the social fabric of those dependent on revenue from gas and coal? How will our post scarcity society continue to advance? It's going to be more difficult to live up to the potentials of solar and 'free energy' than we think.