I have been using the tetrad (four sides) derived from Marshall & Eric McLuhan’s Laws of Media for several decades. I find it useful for examining emerging technologies, beyond the hype. For example, according to Derrick de Kerckhove, Director of the McLuhan Program in Culture & Technology at the University of Toronto, the Laws of Media state that every new medium (or technology in the broader sense of the word):
• extends a human property (the car extends the foot);
• obsolesces the previous medium by turning it into a sport or an form of art (the automobile turns horses and carriages into sports);
• retrieves a much older medium that was obsolesced before (the automobile brings back the shining armour of the chevalier);
• flips or reverses its properties into the opposite effect when pushed to its limits (the automobile, when there are too many of them, create traffic jams, that is total paralysis)
Here is what that tetrad could look like.