OpenPandora Main OS

My suggestion instead of a full menu, would be to have a tiny overlay over the current running application which allows you to:
- relogin (to close all running applications)
- quit (stop the active application)
- shows the last notifications / toaster messages which you missed while being in a fullscreen app.
- possibly even something like plugin support or icons to check out the wifi-strength etc. from fullscreen apps.

Implementation wise this could possibly be done using
- a topmost window and the same content rendered in screenspace in a GLES hook (which should draw over most applications)
or
- one of the DSS2 overlays maybe

It's definitely something to consider as it was requested on the forums a few times (~"xbox like menu in games").