Whatever the tool, the medium or the editorial dynamic... adapting constantly is the only way!
Responsive design , UX-UI design are on the way to becoming eventually a new kind of "graphic art". There is nothing more unpleasant indeed than to visit a website which is not properly designed for a smartphone. It's no longer a must, it's an obligation... a digital hygiene.
Understanding and practicing multimedia
We would be more inclined to talk about "media fusion", because it is more than a simple coexistence of traditional media in complex environments. But still, readability's rules remain the same.