Well concept art specifically provides entertainment as well as promotes the knowledge of art and technique to another generation. As long as concept art jobs are needed, there will be artists. A little deeper and the art produced provides somewhat of a commentary for today's society. Social subconscious symbols are apparent as well as what properties are demanded by our economy ex) "Sex Sells."
Of course a lot of concept artist do personal art on the side. That art and the by products of that art can affect society in any way the artist pleases.
"Astronomy offers an aesthetic indulgence not duplicated in any other field. This is not an academic or hypothetical attraction and should require no apologies, for the beauty to be found in the skies has been universally appreciated for unrecorded centuries."