Arthur C. Clarke: Communications in the Second Century of the Telephone (1977)

Before you laugh at this myopic Victorian, please ask yourself this question: would you, exactly a hundred years ago, ever dream that the time would come when this primitive toy would not only be in every home and every office, but would be the essential basis of all social, administrative and business life in the civilized world? When we consider the very much more complex devices of the future, is it reasonable to suppose that they too will eventually become features of every home, every office? Plugging in to the Future

It has been obvious for a very long time that such audiovisual devices could complete the revolution started by the telephone.

Source: paleotronic.com