Are NixOS and GuixSD the incoming Linux distros of DevOps? The main advantage of these distros is the declarative approach which allows for setup to be done in the same way as you would configure a Vagrantfile or Dockerfile.

In the way that Docker replaced/is replacing VMs for reproducibility, is there a chance these distros will eventually replace typical distros that are used in a DevOps setting due to their atomic and functional nature?
Some articles, including this one give some arguments why docker is popular:


  In a nutshell, here's what Docker can do for you: It can get more
  applications running on the same hardware than other technologies; it
  makes it easy for developers to quickly create ready-to-run
  containered applications; and it makes managing and deploying
  applications much easier. Put it all together and I can see why Docker
  is riding the hype cycle as fast as I can recall ever seeing an
  enterprise technology go.
  
  Moreover, for once the reality is living up to the hype. Frankly, I
  can't think of a single company of any size that's not at least
  looking into moving their server applications to containers in general
  and Docker in specific.


My personal view is that a tool could be successful if it will solve a (major) problem. For example, a half year ago I gave a presentation of docker in the company, the developers had some doubts until they experienced a issue that it was not possible to run all microservices on their local machine.

The same is applicable to the question: 


  Are NixOS and GuixSD the incoming Linux distros of DevOps?


It depends whether these distributions will solve a (huge) problem.