I would hope that by 2020 technology would bring the price of solar cells down and the efficiency up. Hopefully it would be in the reach of "regular" people like my family. I would like to be able to provide my energy needs without the need to be plugged into the grid.
Imagine what the holiday season would be like. I would still want to put up lights, a tree, and all the other decorations that come with the season. We would be showing movies on the big screen TV to family and my kids will be playing video games. Cooking in the kitchen and running all kinds of electrical devices. Sounds like it isn't being efficient. That is the point. We often focus on efficiency and don't think about how technology is going to evolve over time. The cheaper, cleaner, and more efficient energy is to create the better and richer out lives will be.
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