Are you all forgetting the T, again?
Collectively embracing gender and sex as both open to change as well as a spectrum rather than the currently accepted binary system will have tremendous impacts on the core of society. I'm not saying that overcoming homophobia won't be revolutionary, because it will and it will indeed be a landmark step in human history, but it won't be quite the same as overcoming transphobia.
So much of what is discussed among trans people seem unrealistic enough to be naive and laughable, but all of these things are very real concerns to us. Such as being able to change our legal gender status to one that we identify with, regardless of whether or not we've had surgery or any medical treatment at all for that matter - many of us cannot afford this, or are unable to do this for other health reasons, but does that make our identities any less real? Society says yes, but they arn't aware of how severely that impacts the psyche of the trans person.
Everything would change, if our society came to embrace gender diversity in its fullest. Just think about it.