I saw a relatively elegant multi-touch worksurface solution today – on a bus.
The toughened glass side panels within a bus have a nice way of holding the glass that could be turned around on its side, so to speak, to form an adjustable glass topped table that could be back projected… (obviously I would need to contain the sides of the table once built to avoid breaking the projection beam)
Now am looking at google for key clamped handrail providers (^-^)