I´m not Nostradamus, I just spent 10 skill points on reading:
Maybe spend some additional points, because while it does prove your point in PS4K games being playable on vanilla PS4, it also does state that you will get a worse product because you didn't spend additional 400 bucks for an intermediate hardware bump.
PS4 was 400 bucks, that was a new system for a new console gen, that's an ok price for a new system.
And now there's a fat chance that you have to pay the price of a completely new system, for an upgrade. How is that ok?
There outrage would be significantly smaller, if Sony offered a trade-in for vanilla systems to drop the price of the updated hardware to 200 or below.
If this is a reaction to a possible bottleneck due to VR, they could have planned VR for PS5 instead, it's not that there is any direct VR rival on consoles as of now.
If this is a reaction to MS's intermediate hardware, i don't know why they are scared, it's not that any dev would neglect Sony's massive userbase for MS because of suddenly more horsepower in the console.