We can use the Heartbeat API in WordPress 3.6 to monitor for users who have the customizer open at the same time, just as is now supported when editing posts. This may actually be a feature that will be included as part of core, as it makes a whole lot of sense.
As part of this, once someone has saved a new settings revision, the new revision could be automatically applied to controls and the new revision could appear and be selected in the dropdown.
We can use the Heartbeat API in WordPress 3.6 to monitor for users who have the customizer open at the same time, just as is now supported when editing posts. This may actually be a feature that will be included as part of core, as it makes a whole lot of sense.
As part of this, once someone has saved a new settings revision, the new revision could be automatically applied to controls and the new revision could appear and be selected in the dropdown.