It would be nice to take advantage of all that nice desert we have just sitting in the sun.
While it's true that Solar energy is only good in the day... that is a peak usage time for industrial/commercial energy. If Solar could augment the grid in a significant way during those hours it certainly would help.
Unfortunately, at least one large solar plant project is being challenged in court due to environmental concerns. Same issues for wind farms. I guess the environmentalists that were preaching solar/wind, 20 years ago changed their minds?