Many people think their cloaks are ugly. Blizzard acknowledges this by allowing players to turn the display of their cloaks off. Now in patch 5.1, cloaks can be mogged to look like the cloaks awarded via guild reputation. This change is not included in the patch notes, but game designer Dave Maldonado tweeted the news.
Do you have a cloak you're going to mog into your guild tabard? If so, which cloak?
Post contents updated for accuracy. This new feature uses guild reputation rewards in transmogrification.