https://www.polygon.com/2017/10/2/16395708/playstation-vr-hardware-update-2-cuh-zvr2-hdr-pass-through-sony-ps4

Sony will release a new version of its PlayStation VR headset later this month which will include a few minor but helpful changes to the PlayStation 4’s virtual reality hardware. The new model, CUH-ZVR2, features a “slimmer, streamlined” connection cable and integration of stereo headphone cables directly into the headset.

The hardware revision will also come with a new version of the Processor Unit, the breakout box that connects a PlayStation VR to a PS4, which supports HDR pass through. Previously, in order to use HDR-compatible features on a PS4 or PS4 Pro, PlayStation VR owners had to disconnect the Processor Unit.