This year, at the Edinburgh Festival...
Sitting high up and looking down on others can offer different perspectives, the sensation of being above a place, a situation or an idea gives an "overview" which can create a larger mental space within which to consider what one sees.
For the Festival, Lee Mingwei creates an installation, filling one side of the gallery and elevating viewers much like Edinburgh's physical situation, perched above and observing the surrounding terrain or indeed the gargoyles on Edinburgh's buildings. Gallery visitors at floor level will likewise see people above them without knowing what they are thinking or how they see those below.
So... he's going to build some stairs, then?