I'm glad to see more projects like this. I believe they have finally "gone green" because of the drastically low level of Lake Mead, and the resulting reduction of available electricity generated from Hoover Dam (very near Las Vegas).
If they didn't do something soon, they would've been screwed fairly soon. for over a decade, the SEGS plants in Californias Mojave desert have been doing this with solar heating of liquid salt, to boil water-steam for turbine-generators (sending power to Los Angeles/San Diego).
In the near future, the federal government will be elbowing in to referee the fights between the states over water. When snow falls in Utah/Colorado...how much of the runoff belongs downstream to Nevada/Arizona? We can make electricity several different ways, but crops need water...its going to get expensive and ugly.
Heres a "low water use" golf course in southern Utah (near Las Vegas).