One key transition that defines our digital age is the current transition of mostly paper news to almost completely digital outlets. Most, if not all newspapers now-a -days, have at least one digital counterpart to their print production. This increased influence of digital media on print is exactly what Filak is telling readers to adapt to in order to succeed in writing. Digital and print writing are both very different fields, and each requires a different style in order to be seen as appropriate for their mediums.
Filak specifically mentions blogging when speaking of digital writing, and I think that blogging is a great comparison to how print media is seen. While print is more detailed and extensive, blog posts tend to be more opinionated, personal, and short form. Overall, writers have to adapt for their audiences. This is par for the course with a changing medium, and thusly changing writers.