This screen is entirely independent, with its own power source, so unlike most bistable screens this one could also report when its connection with the Machine is lost, and in a different way than simply turning off.

> That's an interesting case of a display being off actually indicating something ("loss of power") which can't be replicated with a bistable screen.

My kindles usually show a dead battery graphic when I get back to them after a long time away... With enough power storage and the right trigger, this could be done.