You've just gotten back to your Mog House from adventuring, and you've a backpack full of swag. You check your local Auction House to discover that all the items you've put up before are still pending. "Ugh", you think to yourself, "time to set up a bazzar and play the waiting game."
Well, not any more!
FFXIV will introduce "Retainers", NPC's that you hire to specificly hold up to ten (stacks of) items to sell for you while you're adventuring or even offline. They can even keep an eye on AH's for you to buy a specific item at a certain price you set.
This retainer can be set anywhere you want in the market area, or you can "rent" one of the empty booths to help attract buyers for 100 gil a day. The booths can be made to appear as weapon, armor, misc., etc. shops.
Just another improvement to keep you adventuring!