A bunch of people are in a meeting on a table.
Their tablets are down, in front of them.
Each tablet "knows" where the other is in the room.
As people place their tablet on the table, they get a log in / group accept sequence.
All of their tablets are part of a single virtual desktop, and this desktop is ok with spinning windows are at an angle. Each person gets their own private area, a launch bar, but it is easy to share as needed.
Each may have a series of personal windows, but occasionally you want you show something to everyone else in a comfy fashion.
So you flick the window of interest, either in a single direction of the table to a single person, or you broadcast to all tablets on the table. They catch it with their fingers tips, size and place it. Or or it falls to the default position on the person's screen.