I suggest that the sensory typology of an entire 
population is directly altered by each and every 
new extension of the body or of the senses. Each 
extension is an amplification that in varying but 
measurable degrees, alters the hierarchy of 
sensory preference in ordering daily experience 
and environment for whole populations.

Marhsall McLuhan, “The Role of New Media in 
Social Change,” Marshall McLuhan: The Man and  
His Message , (Golden, 1989), p. 36.