It is unclear to me whether the target of the statement is runtime interop between OpenCL and Vulkan or something else, like implementing (a subset of) OpenCL on top of Vulkan. I have not seen statements recently from Khronos that would hint at the later.

>The OpenCL working group has taken the decision to converge its roadmap with Vulkan, and use Vulkan as the basis for the next generation of explicit compute APIs – this also provides the opportunity for the OpenCL roadmap to merge graphics and compute.

From the article suggests at some point OpenCL is going to run on top of Vulkan.

If you ask me, the article is trying to interpret intentionally vague marketing speak in a very specific way. But that is only my opinion.