Doesn't that seem like already the case? I can't imagine hiring someone, especially to work on the web, where you don't look around pretty widely and closely about who they are on the web. If I can see how you write words, how you write code, how you communicate with people, the stuff you produce... that's powerful. If that's out there and available for me to see, that's leg up on someone else where I can see nothing.
One of the things that prevents CV's and resumes from going away is how big companies hire.
When CodePen hired programmers we looked at some of our favourite people on CodePen.
When I worked at a large company recruiters brought people into the company and passed them off to the technical people to interview.
Until we've overcome the problem with non technical people approving engineers we won't be able to fully replace the resume or CV.