Why this? A way to have a shared store of "variables" or states that
any part of e or modules can store some simple things in and thus also
broadcast changes to state, listen to changes in state and react.
I am thinking of things like advertising:
"/power/ac" = [ true | false ]
"/power/battery/low" = [ true | false ]
"/power/battery/charging" = [ true | false ]
"/power/state" = [ "on" | "sleep" ]
"/screen" = [ "on" | "dim" | "blank" ]
"/screen/locked" = [ true | false ]
"/network/online" = [ true | false ]
"/network/location" = "name of network detected"