I don't get the point about such an upgrade not being enough for third parties to develop on it, LCGeek.
I mean, merely technically. You tell us the CPU is quite better than what was in PS4 and especially One. You also tell us that this is no Wii U at all, "thank God", despite not knowing enough about RAM and GPU. Okay. ...why shouldn't third parties develop for such a machine, technically? Hopefully, OsirisBlack's wording paints a harsher reality than what it actually is in terms of "significant sacrifices" for games devloped with PS4K in mind to run on PS4, but still: PS4K isn't a full generation jump and developers shouldn't abandon the almost 40 millions users OG PS4 already has (and that will keep on growing), so a console that should be quite better than OG PS4 and One, released NOW (this year), which is not late in the gen, but around the mid-life of this gen (with the gen concept probably changing in the next few years), why shouldn't it receive support from Western third parties? It's quite different from Wii U in terms of timing of release.
And I want to stress technically, from a mere, superficial point of view. What I'm trying to say is that, given the conditions from the market / rumours / what you said, I think there could be other factors influencing negatively the 3rd party support, like tools available (we know UE4 is supported at least, but we must know how), easiness of development and, maybe above all from another point of view, how the console / family / whatever performs on the market, alongside the games' sales. THESE are the main influencing factors, IMHO, given what we know, what you stated.