There will always be a need for people who are great at finding, shaping and selling content, whatever the platform. That is a unique skill that publishers have.
The image and the word will become more integrated. Perhaps written words will disappear altogether in some media, as images and video are used to communicate more.
In fiction, people will have more control over the outcome of stories, and be able to actually immerse themselves as characters in novels.
But there will still be a place for the beautiful physical book.