(And really, why must the solution to sexism be to make women's clothing more like men's? Why is it okay to put a woman in pants but ridiculous to put a man in a skirt? Isn't that just a deeper layer of sexism, assuming that the male way is automatically the better one? At least TNG made an attempt to meet in the middle.)
At the beginning of the 20th century, clothing was heavily gendered--certain clothes were exclusively worn by men, other clothes exclusively by women--but over the course of the century, wardrobe expansion happened in only one direction (at least as far as mainstream acceptance is concerned).
By 2364, I imagine fashion will be unrecognisable to our eyes, but I appreciate early TNG's efforts to imply that changes had taken place. It'll be interesting to see if the movie version of The Hunger Games
depicts anything along these lines.