I was reading a book on social life of the upper-middle class and new rich of the American 1920s and realized so many things we now do proudly were considered socially taboo back then. This was especially the case for clothing, makeup, women in certain public spaces, etc. What do you think will be different in the 2120s? Or maybe even the next 50 years?
This is just a personal opinion but I suspect the trend is not linear. There will be a surge in acceptance and then possibly a calm in popularity. Social pressures aside, I feel there may be some portion of the world that is bi/pan but not in numbers so large that it would be a huge shift in current status quos. We're also at a time when mental health is seeing an identity crisis and we're trying to label every quirk. Gender identity almost seems like part of a shotgun approach to try and fix other issues.
I do not want to sound like I'm downplaying the importance of sexual orientation and gender identity, but there's just so much going on socially with how fast we're moving as a culture with the Internet that it's hard to predict what is real and what is trendy.