"We happen to think that the generic accelerator interconnect that is derived from NVLink on the Power9 chips, which IBM talked about a bit back in March and which is due in 2018, is in fact going to be supporting CCIX. We also think that ARM server chips need a consistent coherency method that spans more than one socket and that also allows for various accelerators to hook into ARM chips, and CCIX could fill that need nicely if ARM Holdings and its licensees get behind it. Cavium and Applied Micro, which gave their own NUMA interconnects already, are not on board with CCIX yet but Qualcomm, which has server aspirations and no experience with NUMA, is."
My own thoughts about this are that it may not matter. The low end of the market is NUMA (AMCC & CAVM), the high end may ne CCIX (PowerPC), and INTC will go its own way like it always does.