One point about concentrated solar power is if it's used to collect heat for a turbine (for example, to boil water), then you're running a heat engine and have to have a cooling facility.

As may have been mentioned here in the past, there is concern about whether Arizona may effectively ship a meaningful fraction of its precious water rights to California in the form of electricity by this method.

http://www.azcentral.com/arizonarepublic/news/articles/2010/01/17/20100117water-solar0117.html

I think it's pretty clear that PV and batteries are going to be the way to go ultimately. Timeline is uncertain...