What's next?

I've been wondering this for a while now. Once LGBT rights are done, what's next? Now, I know there will still be anti-gay people, just like there are still sexists and racists even those are protected groups across the U.S. But once there are LGBT protections, what's next? I can't think of anything that people are born with (gender, skin, orientation) that would be discriminated against next. Maybe atheist? I know there are a lot of people who's families would be angry if they found out they were atheists. Although there are legal protections concerning religion already, but it could be more of an acceptance movement than anything...your thoughts?