Fish-eye skewing and widescreen stretching are 2 different things. But some games do use stretching to fill in the extra width (Modern Warfare 2). Fish-eye skewing will always exist on a flat panel and the wider your FoV the more skewing. I actually wrote up a long explanation but then realized I could just say this.
Yes,
However, not all games allow modification of FoV, and resort to stretching.
Besides that, we would not notice the fish eye skewing unless the FOV is drastically different than the actual FoV the displays take up in our eye. It is just a property of optics, since the screen can't compute where your head actually is all of the plane projections assume the observer is at the mid point of the displays.
That being said.. I was differentiating between our peripheral vision and that of the character in the game. I assumed folks were talking about being able to tilt the wing displays inwards to allow one ot look to teh side... which is not how it currently works as it assumes a single plane when projecting the image plane... it would be a much better solution to have the game 'see' the individual screens and allow multiple imaging planes. That would be required for our peripheral vision to be occupied.
But yeah, the characters peripheral vision is often added by increasing the FOV and resulting in a globed surface being represented on a flat panel (causing the fish eyeing). Assuming the game does not have a fixed FoV (many games do)