And you still need all of your real power plants if you want electricity when the wind isn't blowing

Promise of wind power has its price - TwinCities.com

Lindenberg, who participated in a briefing on wind energy for congressional aides, said existing lines are capable of carrying only a small amount of projected wind power, thus requiring an ambitious plan to construct new lines and towers. Walker pegged the cost at $60 billion, but Pickens projects a cost of about $200 billion.