Computers are so small and cheap these days that the phone in your pocket
has more computing power than the biggest corporate computers of a few decades
ago.
A similar phenomenon is driving down the cost of solar electricity.
Ramez Naam writes in ScientificAmerican,

Smaller, cheaper, faster: Does Moore’s law apply to solar cells?
Here’s a summary in one diagram:

Solar may not be the most affordable power source today, but wait a few
years and it will be.
Or get on with organizing the political and corporate structures
to be ready.
In sunny south Georgia, solar is our best bet.

-jsq