I'll talk about E-books itself and its future.
Recently, the number of paper materials such as books seems declining. On the other hand, that of electronic material products is sold on the Web, mobile phones, or smart phones. Probably, the number will not be changed in the future or the non-paper materials will account for the larger proportion of the gloss publish.
However, I think that paper materials such as newspaper will not vanish from the future world completely.
That's why I assume that the number of non-paper materials is larger and larger as time goes by but the heavy materials will remain forever.
