See this.
It seems obvious that Solar will eventually dominate. It's always there,
and there is more energy from the Sun, especially if you include
potential future space based collectors, than our civilization could
ever use all of. It's just a question of perfecting the technology, and
every year brings continuous improvement in that regard.
Nuclear? Pffth.
Way too dirty, complex, expensive. (Dirty little secret: all nuclear power is subsidized by governments). (Fusion power included; so far the technology is barely able to sustain a reaction, and the technology is about as complex as the CERN accelerator. Maybe someday... after all this is the same energy as powers the Sun anyway... but not soon).
Wind? Ancillary.
Tidal or hydrothermal? The physics and technological feasibility just don't work.
Geothermal? Also ancillary. There just isn't enough of it, and if you go deep enough to make it universal the cost benefit equation doesn't work.
Solar will be it.
UPDATE 10/17/2014
Or maybe not. Lockheed has announced proof of concept for its compact fusion reactor project at the "Skunk Works" in Palmdale, CA See this and this.
07 October 2014
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