I went a different way and bought a 42" 4K display¹ (that's roughly the same PPI as 27" @1440p, so 100% zoom on Windows or Linux is just fine, no UI scaling nonsense).
So basically I have 42 inches (107 cm) worth of diagonal in front of me:
Height: 20.84" (≈53 cm); Width: 37.05" (≈94 cm); PPI: 103.64 (≈41 pixel/cm).
This gives me 476x118 lines (476 = 5.95 × 80 chars!) in full-screen terminal using small-enough fonts² (no reading difficulty here, productivity/comfort > all). Key thing being, vertical space versus a much shorter ultrawide (but about as much horizontal real estate). I think it matters a lot for coders, sysadmins, people who look at text (code, logs), long lists and tables in general.
I must confess that I feel slightly constrained by this monster in a way I hadn't anticipated: whereas real estate is never much of an issue, what I'd call "lack of separation of concerns" emerges: most Desktop Environments are not designed to manage several spaces, at best you get quick quarter-screen resizing for a window but that's weak when you have room for almost 4×1000 pixels horizontally (and more than 2000 horizontal). Remember, this isn't like your typical laptop at 4K: you really have all those pixels to work with at 100% scaling.
So you'd want more avanced features, and moving to e.g. i3 (Linux DE, or rather WM) begins to make a lot of sense.
The software is necessary to managing all that real estate, and it's a little bit of a desert because we haven't really moved to the "wall of screens", "cover my field of view" paradigm just yet. If you like tinkering and use Linux you probably can get 80-99% of the way there though, depending on how demanding you are.
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But beyond that I think I'll eventually extend this setup to a 3-screen config, with two side 24" displays in portrait mode (which at 1080p unscaled, or 1440p scaled by 1.25, yields almost the exact same PPI as the middle 42.5" juggernaut). Something like that, with either 2×B or 2×C for obvious symmetry:
┌───┬───────┬───┐ A: 2160p 100%, PPI 103.64
│24"│ 42" │24"│ B: 1080p 100%, PPI 91.79
│ B │ A │ C │ C: 1440p 125%, PPI 97.91
└───┴───────┴───┘ (C = 1152×2048 usable)
This would allow me to put things "aside" literally so — monitoring and tracking, ref docs/notes, previews... Things I'd rather not move or rarely so.
I would never trade my uninterrupted 42" for the little convenience of optional separation, but I'm definitely considering adding this to that.
I strongly recommend you look at this option because it's made me virtually unobstructed by anything display-related since I've had it (small thing: I wish it had more DP/mDP inputs).
A smaller version of this setup has a 37" landscape in the middle and 2x21" portaits on the sides.
[1]: Dell P4317Q with up to 4 simultaneous 1080p inputs https://www.monitornerds.com/dell-p4317q-review/
[2]: Adobe Source Code Pro 9pt, which at 100% with forced 104 DPI to fit the display yields a pretty legible font size. I do most web browsing at 100% or even sometimes less for density.