As Off Duty outfits, I'd like to add the Klingon Wedding attire (worn by Worf and Jadzia... awesome outfits!), and some sort of Federation equivalent.
It's not on the "near-future" list, but it IS brought up often when we talk about off duty clothing.
Unlike the Klingon attire, you could think of adding Troi's pink wedding dress from Nemesis, The wedding dress that belonged to Campio's mother that he gave to Lwaxana Troi to wear - remember it was all silver! lol - and there was another when Picard presented that woman to that guy to bring the two worlds together.. .um forget the details there eek