I really wish that they would **** off with the #K nonsense. 7680x4320 just isn't "8K".
By media standards, yes, it really is 8k. When more consumer 8k displays come out, it's what the resolution is going to be.
Not sure what the problem is, anyways. Like 4k, they are using horizontal pixel count as a general guide for the name, rounded a bit for convenience. 'Four k' rolls off the tongue much better than 'Twenty one sixty p', after all. Likewise, 'Eight k' will be much better than 'Fourty three twenty p'.
300ppi is a total waste on a monitor. That kind of ppi is useful on small screens like cell phones that you put six inches from your eyes, but not at a monitor two feet away from you.
I dont think most people hold their phone six inches from their eyes. More like 8-12 at least. You may not think that's much of a difference, but at close distances, that actually makes a very big difference in how much of your FoV it is taking up and thus the perceived resolution.
Just as a quick test, I grabbed my 400ppi 5.5" phone and lined it up in front of my eyes roughly where it matches my 82ppi 27" monitor(both are 1080p) in front of me. That puts it about 4" in front of my eyes and is completely and totally unusable like that. I need to pull it away til it's about 10" or so before I find it comfortable to use, and at that point, it's really only about filling up maybe 1/3 of my monitor's size in my FoV.
Truth is, my phone probably doesn't need to be 400ppi at all. It'd probably look 97% as good at 267ppi(720p instead of 1080p) at the distance that phones are generally used at.
Yet clearly 82ppi for my 27" monitor is definitely not good enough. I'd say that 4k, which is only 163ppi, is going to be entirely sufficient for consumers from what I've seen, and going any higher is going to hit seriously hard diminishing returns that probably aren't going to be worth it unless we just have oodles of processing power that doesn't know what to do with itself which I cant imagine happening anytime soon(or ever).
The case for this is even stronger if we talk about TV's in the living room.
Basically, I agree that 300ppi/8k monitors/TV's are overkill outside of professional uses. But I dont think that 300ppi+ is exactly that useful for smartphones either, since we actually hold them far away enough that they are *smaller* than our monitors in terms of FoV. The only reason I'd want to see mobile displays go up in resolution is for mobile VR. Otherwise I find it a waste of GPU power and battery life.