First off- It is true that EVERY SINGLE guy who is into musical theatre is thought to be gay by many people. At least once a month I get questioned about my sexuality, and it's been this way for FOUR years. I personally do not think my sexuality is relevant to my interests but others believe that liking musical theatre and being gay ARE THE SAME THING: call it controversial if you want, but it is true.
Next- Theatre has ALWAYS been more open to gay/flamboyant characters and it seems only natural that in today's world, where "gay" is in every art medium (music, television movies etc.),there would be an even greater number of gay characters. 40+ years ago having a gay lead would kill a show, and threaten an actor's career, but, once again, in today’s world having a gay lead is OK and opens up the theatre to many interesting new stories (i.e. "Zanna Don’t").
I would NOT SAY Broadway is becoming more queer, but it is giving today’s world shows that will entertain us, and, in some cases, make us think. An example of this would be if a "not-so-liberal" person goes and sees "La Cage..." they might understand that a "gay-family" can be just as loving and NORMAL as any "straight family". I'm not saying this is going to happen, but it might.
David walked into the valley
With a stone clutched in his hand
He was only a boy
But he knew someone must take a stand
There will always be a valley
Always mountains one must scale
There will always be perilous waters
Which someone must sail
-Into the Fire
Scarlet Pimpernel