Naw, you're still oversimplifying it and being way too pessimistic. Renewables aren't 100% the answer yet, but their LCOE in practice isn't that bad right now at all[1]. I realize this is at relatively low levels of penetration, but their uptake has been extremely rapid and tech progression has been quick. Solar is still expensive as fuck, but everyone knows that. Look at those variable O&M costs though, those are some sexy zeroes if you can lock in your other costs adequately.

Pages 10 and 11 here [2](warning, pdf), discuss wind curtailment in MISO, where they've tackled the curtailment problem head-on with great success. They also estimate that they can keep manual curtailment incredibly low until wind doubles in capacity from the time of the report. The intermittentency is not overwhelming until you have much more wind in the system than we currently do. Additionally, there are exiting traditional storage techniques that don't get much traction for a variety of reasons (like pumped storage), which we could build out hard if we actually needed to.

A healthy mix of renewables, storage technology, grid upgrades, and more efficient traditional generation technologies would leave us in a fine position.

[1]http://www.eia.gov/forecasts/aeo/electricity_generation.cfm

[2]http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd...

Hmm, never been downvoted before for providing a sourced comment with relevant information. Guess people aren't down for discussion today.