The content is a display of the color of the light inside. I think the content does match the display because it's about creating an illusion of uniformity through low "resolution"; in this case, each aluminum stave could represent one pixel in a traditional display. This display is not meant to convey information, except that which represents the nature of the light inside. Additionally, at a distance the display completely merges with the physical exterior, just as at a distance a low-resolution display gains perceived clarity.
The Sitooterie is certainly reactive to its internal light source, and purely dynamic because as a system it is stateless. At any given time it represents exactly what is inside. It has mild interactivity since the internal light can be changed to achieve a desired external effect, but it's definitely not generative or pre-rendered.