It runs very well on resumes. Seriously, I interviewed a guy last night and he wants 400k a year. I asked why, he said it because he is a container expert.
Apparently I am underpaid and this must be in the valley, right? That should be standard technology for an SRE by now. I have been using Docker since 2013, and I rarely encounter developers who don't have at least basic knowledge.
Once you dive really deep into Kubernetes with service meshes etc., that's where it gets interesting.