One could argue that he was the first to grasp and utilize the mass production and dissemination of the two dimensional image. Many of his pieces became popular icons immediately upon creation, and remain buried in the universal consciousness of the western mind.
It has always fascinated me that creativity and positive thinking are often born out of limitation. When there is adversity, it seems, we humans have all the greater incentive to work out ingenious ways to overcome obstacles, protect ourselves from harm, and chart new territory.
The physical book will always remain in some respect, but more as an aesthetic curiosity, and a fine, curated remnant of a prior age. But reading? Whether by candlelight or halogen, that will be done by Kindles, Nooks and iPads.
Journalism isn't in jeopardy; it's just in another transition to a new and better place. And as long as the public puts a premium on quality information and analysis -- and the public always will -- journalism will thrive.