There are some things that society considers normal today which wasn't normal a few years ago.
Take sex scenes in movies. When I was at school, seeing a pair of boobs was always an age restricted: 2-16. A sex scene where you saw boobs or a bum was 2-18. Today, I've seen 2-10 movies with boobs flashing in a few scenes. It would have horrified us back then...but as time has gone by and the more lenient the restrictions got, the more "normal" it became.
As I observe our society today I see open gay relationships moving in the same direction. The message to our culture is that being gay is acceptable and normal, as long as you stay true to your partner as one would in a straight relationship. Soap operas are airing kisses between gay men, movies are doing the same. And just this last week, Disney announced that a new character in their latest installment of Beauty and the Beast will be gay. Ten years ago these things would have been heavily restricted. Today, the world is forced to accept it as normal. Today's children don't know how society was ten or twenty years ago, so they don't see it as indifferent. It's become their normal.
As society evolves it's acceptance of gay relationships, many see it as progressive and victorious for the gay community because to them, acceptance hasn't been a commodity.
On the other hand, those who value straight relationships for whatever reason and still view gay relationships as wrong will be put under tremendous pressure in years to come to either confirm with the new normal or else....