We Will Not Have Pockets in the Future: As mentioned in Waistcoat of Style, both sexes wear waistcoats simply to provide adequate pocket space for their collection of little gadgets for this and that and the other thing. So, averted to the point that there’s actually a specific garment to provide the future-pockets.
Waistcoat Of Style: Played straight, for both sexes (cut appropriately differently). The Empire is a “thingist” culture that particularly enjoys its little pocket gadgets for this and that and the other thing, so obviously, you need a garment specially adapted for keeping them in, starting with your fob… terminal.
(And you generally can’t use your trouser pockets, because your weapon belt – and attached sidearm and blade(s) – gets in the way.)