I think "possibility" is vastly understating it given how much of the spec is written around the ability to do just that - and how it will be the only way to keep the lights on when demand exceeds supply when TPTB decide it's getting too expensive to pay to keep the likes of Fiddlers Ferry available.The ultimate possibility is, of course, for 'unit rates' to vary from hour-to-hour - which could, as some people fear, eventually result in significant rises in electricity costs for people with some patterns of usage.
And of course, the remote turn off if temporary rate hikes don't work.
We all know that if the real reason was just to give users more information then much of the comms infrastructure just wouldn't be needed.