Looking at the legislation of Great Britain, it's dangerous to fall into the trap of thinking that same-sex marriage is the be-all and end-all of LGBT rights. Here we have protections against employment, housing, service, and all kinds of LGBT discrimination, and such protections don't exist in every US state - you can marry your same-sex partner and then legally be fired on the basis that you have a same-sex partner. There need to be laws that make such things impossible.
There's also the fact that legislative rights aren't the finite end of any civil rights movement at all. Societal attitudes towards homosexuals need to be normalised before the gay rights movement can said to have been a success; until gay people can walk down the street holding hands with their partner and not be judged or feel intimidated for doing something so simple, there's still a ways to go. This is to say nothing of the mass struggles facing Trans* individuals, who are still poorly understood by too many people.
As for the marriage struggle, though, I suspect the next country to go for it will either be Germany or Australia.
There's also the fact that legislative rights aren't the finite end of any civil rights movement at all. Societal attitudes towards homosexuals need to be normalised before the gay rights movement can said to have been a success; until gay people can walk down the street holding hands with their partner and not be judged or feel intimidated for doing something so simple, there's still a ways to go. This is to say nothing of the mass struggles facing Trans* individuals, who are still poorly understood by too many people.
As for the marriage struggle, though, I suspect the next country to go for it will either be Germany or Australia.