Fatshark confirmed that while Warhammer Vermintide runs at native 4K with graphics enhancements (improved texture and shadows) on Xbox One X, they're targeting 1440P for PS4 Pro.
https://wccftech.com/warhammer-vermintide-native-4k-xb1x/
Splendid
https://wccftech.com/warhammer-vermintide-native-4k-xb1x/
Splendid