I think the major difference is that this article describes some meta concept. Despite being abstract its very concrete. If 2 people read something that is fantasy or even describing a physical process like wood carving. Despite reading the same thing both parties have an entirely different picture of what happened. The clothes on the people are different, the building they occupy is different, the wood you are carving is different, the tools you use are different. These difference are actually the most increasing details which your brain fills in, and this is something completely different from when you watch TV. All the details are filled its concrete and non-abstract. It can still be a compeling story or piece of art but often people are are much worst artist and visual things rarely capture all the things your brain can fill in for detail that make something cohesive. And the details they fill in are often details your brain finds mundane and ignores entirely.

I've been learning about wood turning and carving recent and the amount of character it instils in what use to be dead piece of furniture in a room is honestly life changing. Reading can do this but there are other physical activities which I think a digital society loses touch with. Most of the Ikea furniture today is well engineering but artistically dead (definitely cheaper though :D ).