Weapon/armour displays are confirmed for 4.X series:
...but that means it'll still be a good few months before they show up...
PAX East 2017 Community Q+A Wrote:Question 18 - Armour and Weapon Display in Housing
Audience Member 9: I pride myself in being an interior decorator mean in Eorzea, and I have always wanted to be able to display my epic gear and my weapons that I've worked really hard on in the house. So I was wondering if maybe we could get mannequins or weapon racks? (audience applause)
Yoshi-P: (thumbs up as Aimi translates "interior designer") We just so happen to have a similar conversation to that about four days ago in Japan. But somewhere along hopefully the 4.X series, we're looking into the possibility of it.
Aimi: Oh, I'm sorry - definitive! We will accomplish it in the 4.X series!
...but that means it'll still be a good few months before they show up...