This game is locked at 900p 30 fps "to avoid all the debates and stuff" per senior Ubisoft producer.
I was on the fence on getting this game, but now I'm not buying this. The PS4 doesn't compare to a high end gaming PC, but even Grand Theft Auto 5 (I think) is running at least at 1080p and GTA5 open-world is definitely more taxing than AC open world.