I'm not sure I totally agree with the thrust of this TCS: Tech Central piece, but I thought this quote was interesting. So, for your pondering pleasure:
McLuhan [famed for his observations that the medium influences the response to a person's message as much as the actual message] . . . remarked: "Media, from the phonetic alphabet to the computer, are extensions of man that cause deep and lasting changes in him and transform his environment. Such an extension is an intensification, an amplification of an organ, sense or function, and whenever it takes place, the central nervous system appears to institute a self-protective numbing of the affected area, insulating and anesthetizing it from conscious awareness of what's happening to it."