Back to the OP....

"Solar thermal plants covering the equivalent of a 92-by-92-mile square grid in the Southwest could generate electricity for the entire United States."

"The technology has no obvious bottlenecks and uses mostly commodity materials -- steel, concrete and glass. The central component, a standard power system routinely used by the natural gas industry today, would create steam to turn a standard electric generator. Plants can be built rapidly -- in two to three years -- much faster than nuclear plants."

Seems to be a no brainer
with 8-10 cent cost per kilowatt hour when capacity reaches 3000MW, with projections to 6-8 cents with improvements in manufacturing and design, along with the possibility of higher temperature operation