A higher level of egalitarianism between the sexes increases utility.
I haven't looked at the literature in a long time, but I seem to remember there being an inverse relationship between sexual equality and self-reported happiness (particularly among women in developed countries). Is this not true? Of course, even if utility for women decreases it might be made up for by increases in utility for men, but I am unaware of any such phenomenon.
EDIT: I had something like this in mind, but remember it having cross-cultural comparisons, so this probably isn't exactly it.
One interpretation is that we're in some kind of awkward middle stage where women are trying to fill multiple roles (perform well at paid job, look hot, take care of the house, raise kids, manage family's health, have a social life, etc.) I know I was raised with the message that it was important for me to be good at all of these things, and I would feel more a failure if I didn't do them all than I think my husband or most men would.
I can imagine that women's satisfaction would increase if role expectations were more egalitarian.
Upon reading Eliezer's possible gender dystopias ([catgirls](http://lesswrong.com/lw/xt/interpersonal_entanglement/), and [verthandi](http://lesswrong.com/lw/xu/failed_utopia_42/) and the other LW comments and posts on the subject of future gender relations, I came to a rather different conclusion than the ones I've seen espoused here. After searching around the internet a bit, I discovered that my ideas tend to fall under the general category of "postgenderism", and I am wondering what my fellow LessWrongians think of it.
This can generally be broken down to the following claims:
EDIT- Due to some really insightful comments;
I replaced men being prone to aggression as a negative, with men being prone to suicide.
I made the verbiage a little more explicit that no one would be *forced* to change, but would seek out the changes that transhumanism would have available.