No common sense is when you buy a beverage that if it says 500ml it is min 500ml+
I know as i work in a beverage company & this is what is the legal standard.
K = min 1000 & we should not be accepting rounding up. & with display k = width.
When using XXXp it is height.
Neither has proper meaning without application whether you use hdtv standard or aspect ratio.
Which is why maybe MegaPixels should be used to represent screen realstate
PiMax 8k 16MP
8k Uhd 32MP
True 8k (1:1) 67MP
Or if direct comparing with HD.
PiMax 8k 1/2 height of 8k uhdtv.
If clinging to k is only at 16:9 then the Vive Pro is 3k as i beleive 2880*1600 is 16:9 (slightly over)
Where as my lg g6 under the 16:9 is not 3k since it has only 2880*1440 opposed to 2880*1620. But yet both are 3k. G6 is simply at 18:9 or 2:1.