For what reason would they want to do that, are they trying to be the new Mother Nature or the new god? I can't think of any reason to want to do this unless they are trying to give homosexuals who want to be parents a reason to not incorporate a woman into the whole thing.
Your right Krusten homosexuals would benefit from this but is that the only ones? What about a sterile man or woman would they not benefit?
So yes some great applications could be found. It is not abnormal for some species to change their sex if not enough of both are present in their environment. The real reason I think is just to prove it can be done. Same reason as a person climbs Mt Everest.