The ideas of gender have been changing rapidly in the west. Two trends that I notice are the blurring of gender roles and the blurring of personally defined gender.
What I find interesting is that the two are sort of redundant. If the roles or men and women in society, their clothes etc become the same, then what does it mean to define oneself as a different gender than one's birth gender?
I was born male and consider myself male. But what if I considered myself female? In a society where the roles are equal, as a male I can stay home raising children, work as a nurse etc. I have no interest in knowing.
In most of life I have no more interest in someones gender than in their orientation. I have co-workers who may be gay, trans etc,
The only place I see a real difference is in dating / relationships where most people have an immutable preferred gender (unless they are bisexual). In that case though, ones biological gender still matters - even after sex change operations, people cannot function as the other gender with respect to having children.
I don't have a real point her, I just think the changes in the definition of genders are interesting.