I often read predictions about future technologies from analysis companies like Gartner Group. These studies often strike me as awfully linear in their view on development. I would, therefore, like to know examples of people who have been able to predict the consequences of technologies that have radically changed communication. I use a very broad definition of communication, to include transportation infrastructure, so predictions on the impact of things like a postal service, the train, the automobile, telegraph or a modern thing like Twitter are all interesting.
In his book, "The Gutenberg Galaxy" (1962), he basically predicts PC, WorldWideWeb, Wikipedia, Google, social-media, e-commerce everybody uses today in the western world:
Be aware, there were still in the late 70s entrepeneurs doubting a market for personal computer:
An important position of McLuhan and other theorist like Jacques Ellul is the concept of Technological Determinism. Ellul's book Technological Society (1964) forecasted many developments and problems modern societies face. Really an eye-opener and well written.