What I think is interesting is that when you consider the inevitability of national acceptance of same-sex marriage, and what will follow from that, which will be basically that states and entities seeking government money will have to recognize same-sex couples and treat them equally. Then add the Mormon history of getting a revelation that can change anything, literally anything in their doctrine, even something as fundamental as polygamy, it looks like eventually, we will see a Mormon revelation accepting same-sex marriage. Not soon, not in my lifetime, but I do think that's the way it will go. Now that's interesting.
btw, none of the Mormons here think so, but that fits the pattern as well. As long as it's doctrine, it's followed, believed, revered and will never change. Then you get the new revelation and bingo, it never was doctrine, it was just the mistaken, human interpretation of previous leaders.
To me, this whole approach is one of the most fascinating and successful aspects of The Mormon Church.