Rick, sorry imissed your earlier mention of water.
Water is and will be a growing issue. Whether the solution lies in reclaimed water, more innovative natural water (rainfall) systems, improved genetics, artificial surfaces, a return to a time before irrigation or some solution unimagined, I have to believe that h20 may be the most important in the industry within the next few decades.
Without a solution the game may return to a passtime for the elite. If we haven't gone there already.