We'll have to agree to disagree on what is 'good' then.
I am only playing on a 49" 4K TV. A fairly decent Sony Bravia FALD panel.
Ratchet and Clank looks stunning, Miles Morales, Spider-Man, Demon's Souls, AC: Valhalla and even Astrobot look excellent.
PS4 Pro non-1080p titles look 'good'.
Elite looks 'poor' in comparison, in my opinion. A blurry shimmering presentation compared to 'every' other game I play. This is why it needs a native version imo.
If you compare 4k with 1080p on a 4k screen, 1080p will always lose since the vast majority of 4k displays are quite poor when it comes to display content using a non-native resolution
You should really compare 1080p content vs 1080p content on the same 4k screen.