PlayStation 5 and Xbox Series X will deliver a much-improved PUBG performance, with 60 FPS "Framerate Priority Mode"
According to the PUBG Corporation, PUBG is set to run at 60 FPS on both the Xbox Series X and the PlayStation 5. The next-generation consoles will be running the Xbox One X and PlayStation 4 Pro builds of the game, respectively. Players will have the option of selecting the "Framerate Priority Mode." On the PlayStation 4 Pro and Xbox One X, selecting this option drops the resolution to 1080p but unlocks the framerates, which tracks close to a consistent 60 FPS.
The announcement doesn't clarify whether or not the next-gen console iterations will need to drop to 1080p in order to enable 60 FPS gameplay. If they do so, we'd expect a patch to up the resolution since equivalent PC hardware blazes past 60 FPS, even at 1440p.
Interestingly, the PUBG Corporation noted that the Xbox Series S will not receive a 60 FPS mode right now, though they are trying to get this to work on both the Xbox Series S and Xbox One S. There are two possible reasons for this. One is that developers themselves could be trying to differentiate Series S and Series X versions of their games.
The other, more likely reason is that the lack of RAM on the Series S meant that PUBG Corp could not get the Xbox One X version of the game (presumably with higher-resolution assets) working on the Series S and therefore opted for the One S code. Considering the Xbox Series S's specs, we should see a 60 FPS mode of some sort down the line.