This is not true! The International Workshop on OpenCL was held this past week in Toronto (OpenCL 2.2 was announced there), and there was a session with several Khronos project leaders (including the chair). The future of OpenCL was a big topic and they explicitly said that this has not been decided yet. Yes, it probably makes sense to merge the Vulkan and OpenCL SPIR-V flavors more, but that's not 'Vulkan anf OpenCL will merge'. If anyone reading this was at the conference too and heard something different, please chime in - but if what this article says was said there, it must have been in a parallel conference with people saying the opposite things than what I heard.
Great, maybe we'll finally get OpenCL support in the proprietary Nvidia driver for FreeBSD? And then maybe CUDA support in their driver also? One can hope/dream.