Just to be sure we're all on the same page...this article ONLY pertains to these specific designs using multiple-mirror arrays that concentrate radiation onto a small absorber located on top of a tower!
It's NOT talking about standard PV panels often seen on houses, buildings, sailboats, etc.
There are many, many types of SOLAR power, solar arrays. They don't ALL generate electricity. I have two solar collectors back on my roof now, but they heat water NOT generate electricity.