The next Diablo 3 patch... at last goddammit.
New Feature: Armory
Players may now save up to five different builds per character using the Armory. This new feature can be found in the town hub within each Act. Saving a build in the Armory will snapshot your character’s current gear, socketed gems, active and passive skills, and Kanai’s Cube powers. Equipping a saved armory build will automatically swap items and gear between the character and stash.