Hex Boron Nitride mono-layer is similar in proton (hydrogen ion) conduction, an electrical insulator rather than a conductor, and graphene can be grown on a layer of h-BN. This hybrid structure offers a possibility of fast transistors.
imho the more important application is for water desalination. graphene takes 80-90% of the cost of electricity out of desalination—where the cost of electricity represents 1/3-1/2 the cost of water desalination.
http://www.thegraphenecouncil.org/?page=Desalination
This is a big deal because when desalination & energy costs get low enough —they’ll make it economic to for farming any desert anywhere. That would roughly double the size of habitable earth.