If wind power isn't worth the effort Texas Oil Man T Boone Pickens is wasting a shit load of money building a 4 gigawatt wind farm in far west Texas. The first gigawatt will be on line in 18 months. The shortest lead time of any form of energy.
For those who can't read a map west Texas is 300-600 miles from the population centers where the energy will be sold. That's bigger than New Zealand, though not mountainous. Then again electric towers can be strung across mountains just fine.
And yes, wind power does drop out at the most embarrasing times which is why you waste the energy necessary to pump up your hydro lakes. It makes a small, <10% impact, on overall cost and guarantees steady supply.
When one of the worlds richest oil men starts building wind farms wake up and smell the... wind?
Hydro is pretty much fully developed in the world already and is severely impacted by weather changes. Ask the folks in the USA Pacific northwest. PS Weather is not to be confused with climate. If you talk about a change over 5 years it's weather. If you are talking centuries it is Climate.
Tidal (wave) power is not really feasible except in a few rare locations.
Solar is too damn expensive until better panels come along and only generates 8-12 hours a day.
Nuclear takes 10 years to get a plant on line if you are lucky.
Coal is the DIRTIEST source of energy on the planet. The coal ash piles emit radiation and heavy metals like lead and mercury leach into the water supply, not to mention the amount that gets airborne.