Working with cloning objects for faster rendering times: the clones take up less processing power for the computer.
Once you clone your object, you can align them all in rows, or you can scatter them: randomly, resize, shift, tilt, etc. From there you are one step closer to global domination.
The only drawback seems to be the lack of collision detection, and you end up with intersecting geometry which breaks the illusion. There is a whole system to this with various ways to control the distribution of the objects. Needs more exploring, but amazing potential for real application.
Original chair model by: kok.t from the Luxology website.