Yes - currently, at least. It isn't clear if Hao's Special Works is only a timed exclusive to E&E, but it is not accessible on any other platform. It makes sense to include incentive content not available on PS4 and Xbox One, but it is odd gating off content, which does not exist in the console ecosystem and does not have hardware limitations, from the PC. It is possible Hao's Special Works will see release on PC or other platforms later on, but there is no word on this as of yet.