when I played ED first, I "only" had TrackIR and Polarization-3D on my 47"-TV. Together with HOTAS and VoiceAttack, already this was really great and immersive.
But when I first played it in my 4K, it was still a large step forward and a very immersive experience, although the 4K doesn't have Positional Tracking (which I had/have with TrackIR).
Yes, the small FOV is a bit disturbing, but by far not as much as it is with Skyrim, Project Cars or other games. I think, it feels a bit better with ED since space is dark, so the majority of your field of vision is "dark" anyway. But of course, immersion will certainly improve once again with a larger FOV since you see more of your cockpit and in your eyes' surroundings as with 100°/110°. That's why I am waiting quite impatiently for the 8K
But in any case, the larger FOV will add a lot of immersion to all the other games, too. I agree totally with you @Axacuatl, concerning i.e. Skyrim, especially 'cause I played a lot of side quests and the DLC's as well (appr. 370 hrs in total). That's why I spared the rest of the civil war quest and a fistful of little other stuff for the 8K. But yes, as soon, as this is done, I probably will banish Skyrim forever. Elder Scrolls games are great RPG's, some of the best I ever played. But of course, after a couple of hundreds of hours each, you've seen every corner, every tree and almost every dungeon.
Nevertheless, I am looking forward to the last 5-10 hrs in Skyrim with the 8K