This is something that’s been on my mind for a bit, as a game that made my partner immediately sick was the pre-alpha footage of the game Scorn [CW for lots of body horror imagery, if you look this game up). It has a whole bunch of modern rendering going into really busy scenery and the footage was 60 fps in first-person.
Part of it is that, despite the common complaint that this generation’s graphical gap from the last is small, there’s actually been a massive leap in tech to deliver more immediately convincing scenery. Even though most of it is still inherently unreal (heh), it’s a lot easier for our dang brains to reach closure in like, most any UE4 game as compared to UE3 games. When that’s smoothed out beyond what our eyes expect, it can create discomfort. Quality and technique in motion blur can make or break this, too.
While technically different, it runs into a similar reason for why the terrible modern TV trend of motion smoothing makes loads of folks physically ill, even when watching relatively static-shot old shows.
On another token: OP’s problem with Overwatch PS4 vs PC might also be due to the change in the language of input. Not because they can’t comprehend it, but because the movement on all axes is fundamentally different. Mouse movement obviously flows and snaps different to any analog stick movement, but something less talked-about is how a keyboard affects character movement. KB movement is digital, which means the inherent feeling that you can finely tune your speed and direction at any time on a stick is gone, or rather directly translated to either “all the way in 8 directions” or “stopped”, with maybe a clunky “walk” modifier nobody uses thrown on some pinky-reach-key or capslock. Strafing especially might feel jarring as hell if you’re used to feeling your windup (even if it’s in milliseconds, even if it’s just the impression that you feel it), and now you have controls that jolt you sideways right away when you jam the key down.
side note: fuck PC gaming for making peeps not appreciate how cool and good it is to slow the hell down in games, especially third-person dealies.