If it does happen, I want it to happen organically, not shoehorned in just to show that they're "hip" and "with it".
Yeah, good luck with that.
Back in the 70s, it seemed like every ensemble show needed its "token" minority character. They never seemed to be there organically, and always seemed to scream "See, we've included a black guy". Or woman. Or hispanic. Or, ideally, a bilingual multi-racial woman with some disability.

Now it's the homosexuals' turn: "See, we've included a gay guy, aren't we diverse?"
It's a little harder to do for homosexuals: women and blacks are obviously women or blacks from a great distance, so they can stand in the background and never say anything. Hispanics are a bit harder, as someone has to mention their name. "Hey Rodriguez, help me with this will you?"
And these characters were famously only superficially minority: aside from their name an physical appearance, they could be easily replaced with a white male actor and nothing would change.
For it to be obvious that someone is gay will require even more dialogue, as you have to get them talking about their romantic life. Actually, you don't now that I think about it: a male character could refer to his "husband", and there you go.
I can't imagine how someone could be "superficially gay", but I'm sure Hollywood will figure it out for me.
I'd say we've rounded the first bend here: we've got a decade or so of token gay characters, followed by another decade heavily populated with token gays but also featuring writers rebelling at that by creating gay characters with depth. By 2030, it will be totally mainstream to believe that any character who is not shown to be in a relationship on-screen might be gay. Even characters who are obviously married, if their spouse is never seen and gender is never specified.
See, that's why I rankle at the token gays I've seen in, for example, certain trek books: I've been down this path before, and I'm pretty tired of it. It was lame and irritating in the 70s, and it is lame and irritating now. But I don't know where the fast forward button to life is, so I guess we just have to suffer through it.