Red Dead Redemption 2 has been confirmed to run in 4K on both Xbox One X and PlayStation 4 by both Microsoft and Sony, respectively. This 4K confirmation came after Rockstar released the six minute long gameplay trailer yesterday.
Confirmation about Red Dead Redemption 2 running in 4K on PlayStation 4 Pro can be found on the official blog post which reads "Captured entirely from in-game footage on PlayStation 4 Pro, watch this introduction to Red Dead Redemption 2’s gameplay in 4K", with the aforementioned trailer embedded.
Official Xbox page shows a similar message, stating that Red Dead Redemption 2 will be an Xbox One X Enhanced game and it will support 4K resolution along with HDR, for the TVs that actually support them as well. Microsoft did post a disclaimer that Xbox One X Enhanced features are a "subject to release of a content update".
PlayStation 4's blog description also suggests that the footage shown in the gameplay trailer was captured on a PlayStation 4 Pro in 4K. Rockstar Games later confirmed this to be true in an interview with US Gamer. Therefore, no downgrades should be expected and PlayStation 4 Pro owners can look forward to performance just like on the trailer footage.
Meanwhile, Xbox One X owners will likely get the same performance out of their consoles but it is unclear whether it will be like that on release, due to the disclaimer I mentioned above. Xbox One X Enhanced features might in fact come at a later date as a part of a content update. Maybe Microsoft should really focus on delivering the best experience to their customers instead of calling Sony out for blocking cross-play between the consoles.
Those who have missed the trailer can check it out above, and yes, you can see it in 4K. You can also check out our takeaways from the trailer on some of the features that might be more important than others.