The only economy of this model is that of scale. These 3-D type cells are probably going to cost 500 times as much to produce as current flat panels.

If you put a flat panel in the middle of an adjustable parabolic reflecting array, you can accomplish the same thing.

It is reminiscent of the development of the fresnel lens.
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)