Then you would need to admit that the originater; StarVR saying their headset is 5k (2xQHD) created this false standard for the reasons of 2 displays not 4.
Cineliro(sp?), HeroVR followed suit. HeroVR interestingly claims its the first 5k even though StarVR beat them to rhe "5k".
I personally don't see an issue if we standardise the idea of a difference between "k vr" & k resolution.
8k VR = 7680*2160 not to be confused with
8k Resolution = 7680*4320
As VR headsets are not a standard display; they are special purpose displays.
Personally i think its a misnomer to add numbers together. The 8k in my opinion would be the first 4k headset as the per eye is 4k. Per eye is what we see overall. Why Oculus/Vive/Psvr doesn't look as good as a standalone 1080p monitor.
It would be (a stretch maybe) but like adding the resolution together in a 3 lcd projector, if i understand the panels are layered?
EDIT: This is why we need a real vr summit to create a Standard on reporting vr headset specifications.
-Overall Resolution (gpu power req)
-Per Eye Res (what you see)
-FoV Horizontal & Vertical
-Sub Pixels Per Degree
-Brightness Lux or nits
-Contrast Ratio (real not dynamic)