Ok, so maybe it's just a banker and a barber, but the more I think about it the more interesting it becomes. (No doubt that's why they posted the pic.)
So, let's play "what if?"
What if the three guys in the picture represent a process for customizing your gear? Yes, all three of them.\
- Void Storage. You Start on the left, giving your "cosmetic" items (items that look cool, but have outdated/useless stats) to the Void Storage guy. He holds onto them for you, much like a banker does, but also shares them with the next guy in the line.
- Transmogrifier. Move on down the assembly line (just a step to the riiiight). Talking to this guy lets you use the "look" (model & texture) of items you placed in Void Storage, replacing the appearance of the gear you are currently wearing with the appearance of the gear you placed in the void.
- Arcane Reforger. Final step. This guy is essentially just like the current Reforger. He lets you adjust some stats on your gear, except using items that you've just "transmogrified". Or, perhaps even more likely, he lets you change the spell visual on some gear (i.e., the "glowy" bits on weapons).
What do you think? Makes sense, doesn't it?