Yeah it’s definitely all set up for 4K.

I can see the higher resolution against tree leaves and in texture detail. But during gameplay, when I’m not ogling details but actually playing the game, these things don’t stand out. RDR runs closer to 1440p than checkerboard 2160p tho.

By far the biggest improvement is HDR (in games other than RDR2!) but my OG PS4 provides that anyway.