These look like regular-ass PS4 screens to me. You can see jaggies and dithering in the vegetation.
Noctis' hair in this shot is far better than anything we've seen on consoles screenshots, or the Platinum Demo.
That being said, it's really hard to get decent looking official screenshots from them, so it'll be hard to compare.
Even this batch has some screens that look like shit.
But yeah, it doesn't look like a high res screenshot, but it definitely looks sharper than consoles, to me. You have to remember that even 1080p is higher res than the PS4's lowest res.