Primordial Matter refers to the process of generating organic looking surfaces and volumes by means of digital 3D modelling. As it might look, things escape from a primordial data soup like digital fumes and splashes. While working with surface shaders for the Spells, the White Matter object is constructed in 3D from a cloud of data points.
In addition, the Dark Matter video was shown on a plasma screen.
For a more detailed description of the individual works see the links in the list above.