I would just like to point out the FPS-related difficulties with Dark Souls 2 on PC, which can be seen in comparison on this video:
https://www.youtube.com/watch?v=EVrlwnYkRMI&feature=youtu.be
In this game, they have tied much of game logic to frame rate. It should be noted that the PC version of the game is set to 60 frames by design, which requires modding or system-limiting to change back to 30 as there is no in-game option (30fps displays the console-standard behaviors).
Some other things were not covered by this video as they are hard to actually see. In particular, the invincibility time during a roll or backstep is cut in half when playing at 60 FPS, and certain enemy attacks that have the ability to track the player during their animation now have a ghosting effect described as "shockwaves" by the playerbase.
You can likely expect similar issues in Dead Rising 3. I wouldn't expect anything too crazy, unless something moving at twice the expected speed (not everything will) manages to clip through a solid object in some way, but there could be some game-breaking speed-related issues nontheless