Because they mimic our visual input, which we're used to rely on for survival? Just a guess. > global culture has been shifting from an essentially linguistic

Because they mimic our visual input, which we're used to rely on for survival? Just a guess. > global culture has been shifting from an essentially linguistic culture to a predominantly imagistic one Cue McLuhan writing about 'hot' and 'cold' media in the 1960s, i.e. the Understanding Media book.