What to do with the top-right window space: Esfera

“The Ubuntu “Ayatana” mailing list is discussing a proposal from
Pablo Quirós for a new user interface element to put in the
upper right corner of windows which has been recently vacated on
Ubuntu systems. The “Esfera” is a large circle which is used to
implement a number of gesture-oriented features; details can be
found in this PDF file. “Moved in a semicircle from right to left:
the window is turned, and the back of it is shown to the user. The
back of a window is a new UI concept… The idea is that we have a
‘front’ side of a window, which is what we normally see, and a
‘back’ side, which offers some possibilities that there is no space
to display in the front side.”

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