For me, eye movement does happen at those distances...in other words; my head really does not have to move (it does, but it's subtle and very slight if I really have to.) Also like you said, with the narrow FOV my eyes do have to move, but it's only to look around when I feel the need to, or to follow a subject...I would guess much in the same way other people look at things during a movie or in real life. The point is, at the distance I choose for myself is comfortable where my head doesn't really have to move, unless I choose to; and the distance is great enough that any eye movement is slight and easy on the eyes.Just curious, when you say you like to see the whole screen without moving your head are you moving your eyes?
Reason I ask is I also agree I don’t care for a lot of head moving during a movie even though I enjoy live sports and can easily sit and watch basketball for several hours from court side and be turning my head and body the whole time.
I do think because how our eyes have a very narrow FOV when it comes to really acute focus we move our eyes non stop when watching a movie. So the question then becomes how much eye movement is comfortable for several hours like watching a movie. That point I think changes from person to person quite a bit and the reason we see such a range in immersion people like.
One of the hardest things to get used to in immersive viewing like IMAX is that you don’t have to see the whole screen clearly. The stuff above and below and too the sides is there as peripheral vision filler. All the action and all the director intends for you to acutely view is within the safe central area. If when they move the area of interest away from the center of the screen the movement is a slower pan shot. It is trying to simulate our real vision we use all day every day where we have a huge level of immersion, but we are used to it and don’t find the need to take it all in.
As soon as we get in a theater we feel the need to process it all for some reason.