Yes, I think current male and female clothing will be relegated to the historical closet. This happens with every generation. But with the advent of a unisex society, I expect we'll see an entirely new fashion style, one that is a complete departure from anything remotely connected to gender styles as we know them now, and made with nanomaterials engineered to continuously change along with our bodies as we age. This will eliminate the need to replenish outfits every season. I expect the new outfits will fit like a second skin, making it seem as if we have nothing on, and they will also be engineered to be self cleaning. I imagine that this fabric will have the ability to take on one of millions of colours and patterns that have been programmed into it, such that we will be able to change our look on a whim. No. Better yet, the nanofabric will monitor our brain activity somehow and it will continuously change it's surface appearance based on our changing moods and physiological well-being. And we'll never have to take our second skins off, since they will also be sensitive to climate changes and they will always keep our bodies at an ideal temperature. :D
(Written because it was fun to imagine, not out of malice or sarcasm)
