Until recently, PvP Rewards page contained all vendors and items (an excellent reference for those building their PvP set). Now, there's only a small subset.
It's missing most of the Battleground faction vendors, and does not have a complete list of what's offered in Hall of Legends / Champion's Hall.
Looking forward to a fix to this, as I still think the way Allakhazam's layout displays are still superior to Armory.