Technology is making the cost of many things trend towards zero. Things we used to have to pay a lot for are now cheap or even free - think about how much it costs to buy a computer, make long-distance calls, take pictures, watch movies, listen to music, or even travel to another state or country. Down the road even more of our day-to-day needs will join this list - including, possibly, electricity.
Read more about Energy Becomes Free in the Future. How Will That Affect Our Lives?