Yup, that's how the Open Application Model is implemented for Kubernetes. The OAM spec format closely resembles the spec format for Kubernetes resources so if you use Kubernetes it should already feel familiar. But it can be implemented by any platform.
The idea is to define a standard model for describing distributed applications, so as you go from one platform to another, you get a consistent way of doing things. The actual features that are exposed through the model can be different on each platform that implements it (e.g., platform A has a basic autoscaler, platform B has an advanced autoscaler, etc), but the way you describe and operate the application is consistent.
disclaimer: I'm one of the spec authors
