It works, it just needs a little TLC.
See capx of it working... it will change layouts ever 3 seconds.
The trick is to make sure layout is selected. Go to layer and mark layer as global. Other layout, layers must have same name. Menu and Menu.
You know it works when other layouts, layer is disabled and says "Yes, overridden" or something like that.
There are a few bugs, but ashley said they will be address in future beta releases.
But all in all, it is a great feature and going to save countless hours.