Sony Showcased Improved PlayStation VR Display at PSX 2015 - VRFocusYeah the screens at Paris were the final design, but they had a mixup with manufacturing. Current ones are essentially final.
I guess this explains why we didn't get a price announcement during PSX.
Also: PlayStation VR Cable Features Power, Volume, Mic Controls, First Images Revealed - VRFocus
No one seems to notice or care, but this article seems like it's alluding that the PSVR headset has a built in microphone.