Way to turn a primary limited resource into mass fuel which does nothing but promote 6billion individuals to war even more. From a conservationist perspective, this notion has the potential of causing ecological problems ranging from osmolarity(a MUCH bigger deal than one might initially think) of organisms from sea life to brackish waters. Therein, causing a cascading effect towards the entire pyramid of life.
In a more human-centric directive , turning water into fuel via mass desalinaton is the WORST idea for the survival of the human race, or any other considering all life forms need direct/indirect forms of water. In short, stop wasting research potential into dead tech?...i.e. adding layers of plate armor in a gunpowder age.... I simply laugh at the masses/pseudonerds(lacking real understanding of cause/effect relations of worldly proportions) whenever news media spinkles the word "hydrogen fuel" deriving from water sources(from which there could be no other) and everyone is hails genius. However, it does have niche market and does propel research of hydrogen spliting/molecule interactions, albeit not on a mass scale. In all honestly, until fusion/fission can be contained/harnessed and put en masse, fossil fuels will rein.
Has anyone ever played the Civ series? CHRIST.