From XPUB & Lens-Based wiki

The catoptrics of the society of the spectacle is now the dioptrics of the society of control. Reflec­tive surfaces have been overthrown by transparent thresholds.

SERRES- " Systems work because they don't work. Non­ functionality remains essential for functionality

New media foreground the interface like never before. Screens of all shapes and sizes tend to come to mind: computer screens, ATM kiosks, phone keypads, and so on. This is what Vilem Flusser called simply a "significant surface," meaning a two­ dimensional plane with meaning em bedded in it or delivered through it. There is even a particular vernacular adopted to describe or evaluate such significant surfaces. We say "they are user-friendly," or "they are not user-friendly."

an interface is not something that appears before you but rather is a gateway that opens up and allows passage to some place beyond. Larger twentieth century trends around information science, systems theory, and cybernetics add more to the story. The notion of the inter­ face becomes very important for example in the science of cybernetics, for it is the place where flesh meets metal or, in the case of systems theory, the interface is the place where information moves from one entity to another, from one node to another within the system.

INTERFACE - MEDIA. remediation and layer model. mcLuhan, every new medium becomes the container for a previous one (film is invented as a container for photography, music etc)

The interface is an "agitation" or generative friction between different formats. In computer science, this happens very literally; an "interface" is the name given to the way in which one glob of code can interact with another. Since any given format finds its identity merely in the fact that it is a container for another format, the concept of interface and medium quickly collapse into one and the same thing.

Norman Rockwell, "Triple Self-Portrait"