This installation use Kinect to turn real human into pixel. A clever implementation as it avoided showing off kinect weakness but highlighted the strength.
More reading can be found here:
Perhaps a animated gif can present the idea better.
However, Hybe is not the only one doing thing like this. There are many other attempts:
http://www.thisiscolossal.com/2014/02/interactive-mirrors-built-from-arrays-of-moving-objects-by-daniel-rozin/
Here is my version of it, done using processing with screen base display. Havent have time to draw the grid yet, and i use icon from font-awesome for the representation.
and here is a short video: