This will be a very short post, because to say what I am wanting to say right now doesn't require a whole lot of words.
Amp over at Alas linked to a post the brilliant and amazing Yawning Lion of Feh-Muh-Nust wrote recently in which she asked precisely how transitioning from one sex to another is supposed to challenge, disrupt, or end the binary of gender under heteropatriarchy. I'm referencing the Alas post mostly because it is what is provoking me to write this post, and it doesn't seem quite right not to say that. I am not going to comment on Amp's post or on the specifics of Yawning Lion's post.
I am just going to say this. On the day when human beings, of whatever sex, can wake up in the morning and present, live, be any way they choose, without respect to what male heterosupremacy forces on us because we are born male, female or intersex, on that day we will be able to say that there is no gender binary. I think there is one way and one way only for us to arrive at that destination: by living any way we want to, presenting any way we like, doing anything we like, and continuing to identify as men or women, not because there is anything essential in or about being a man, or being a woman, but for the opposite reason: because there is nothing essential in or about being a man or a woman, or about being born male or female. A man can do, be, look like, present as, dress like, live, in any way he chooses and still be a man. A woman can do, be, look like, present as, dress like, live in any way she chooses and still be a woman. When it becomes impossible to determine, on the basis of how people live or present, whether they are male or female, at that point the concept of gender will be meaningless. Revolution will be a fait accompli.
So long as there is this idea that presenting or living in a certain way means a person ought to "transition," or ought to "change sex," or ought to "identify as" one sex or another, there will be no revolution. There will simply continue to be human beings conforming to gender stereotypes and identifying as "men" and "women" on the basis of how male heterosupremacy has defined those stereotypes.
It's just not that complicated.