The role of the resume has remained constant throughout its 500 years of existence — the point of the resume is to get an interview, in hopes of finally landing a job.
Relative to other forms of communication, though, it hasn’t changed all that much. In fact, most of the changes have been merely cosmetic — most employers still require a one-sheet, black-and-white printed resume at interviews, regardless of the fact that we all use email and have had access to much better design options for years now.