I am in the need of some betatesters for the higher resolutions, as well as the layouts intended for them. My circle of WoW-playing friends with very big screens is surprisingly small.
Slashcommands to switch between layouts are in place, as well as a "recommended layout" feature. The option to toggle the use of forced recommended layouts is in place in the Interface Options Panel, as well as the option to toggle between a global layout, or per character layouts.
Anyway, here are some screenshots taken during a fast run through the Violet Hold: