Yes!
I don't have a console so I'm not sure but I guess they are limited to the TV standards.
PCs and PC games are mostly completely free!
You can disable scaling in the graphics card driver and then create even custom resutions!
I'm playing some games via hdmi on my TV in the living room in 1640x1020 instead of 1920x1080 (I'm sitting a bit too close to the 55" TV so in some games it's just too big..).
I habe black areas all around then of unused pixels.
I have a 34" 3440x1440 monitor (a wider 27" monitor as you said yourself) and simracing is a lot better on it than with my old 27"!
Beware though: more pixels = more work for the graphics card.
I went from 1920x1080 to 3440x1440. That's 2.39x more pixels!
Luckily it's not a linear scale but my fps were almost halfed...
So depending on your graphics card, a 2560x1080 pixels 21:9 monitor might be better if you can live with slightly worse picture quality.
On my 27" with 49° fov, the left border of the view was the left A pillar and to the right I could basically see half of the windscreen.
Now on 34" 21:9 I can see the left rear mirror and see left corner apexes though the side window.
To the right I also see more, of course. I can see the cockpit rear mirror in most cars.
Assetto corsa, acc, project cars, rf2 can definitely use almost any resolution that you can imagine.
No issue with any monitor!
Here's a random picture from chat history with a friend when I got the monitor:
49° fov and I think standard seating position.
Acc though...
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