I just upgraded my framework 13 AMD to the new 2.8k display. It’s nice to have some more real estate, but I gotta say, the rounded display area is a lot more distracting than I expected. Framework has a warning on the display purchasing page so no hard feelings, I just wanted to post pics as a heads up to anyone considering the upgrade.
Its only really noticable on the top corners for me.
A dark background is your friend. 
I agree. Combine that with the reduced battery life and in my case, effectively less screen real estate (The original display is usable for me at 100% scale factor but the new display effectively has to be run at 200% since some applications (Firefox) don’t properly support Wayland fractional scaling yet) and it just wasn’t worth it to me, so I ended up putting the old screen back in.
I just tried fractional scaling on my FW13. Settings <200% seem to work just fine with FF.
–
Rod
It “works”, sure, but the way Firefox handles it internally causes it to render at a higher resolution than the actual window and then scale down. This eliminates the 1-to-1 mapping of pixels from the framebuffer to the screen, which makes text look oddly-shaped and fuzzy. Not everyone can see that (especially today with those crappy PenTile subpixel layouts all over the place and so many Apple products these days scaling everything), but I can see it and it slowly drives me crazy.
Here is a screen shot taken with scaling set to 150%
Other display settings AR 3:2; Resolution 2880x 1920; Refresh Rate 120Hz
Does this exhibit the phenomena you describe? Can you point it out? Personally I don’t see any anomalies, but like you said not all do. Aside from the very small font size it is fine for me, but I’ll never use it. Too much eye strain on my 76YO eyes 
So now back to 200%
–
Rod
Ah, you aren’t using subpixel text rendering, which eliminates the issue since subpixel rendering relies on the application being able to independently address the red, green, and blue subpixels of each pixel, necessitating a 1-to-1 mapping. In any case, just use whatever works for you. I certainly don’t mean to tell anyone else what to do; I just can’t deal with the scaling myself.
Correct me if I’m wrong but a screenshot wouldn’t show the issue since the issue is manifested as the image is attempted to be scaled to the pixels on the screen.
I’m also getting issues with fuzzy text and whatnot and am already considering putting the old display back in lol.
Haven’t really seen issues with the new display. Although I usually run it at 160%.
Atleast KDEs scaling works very nicely.
It would still show the issue because the screenshot would be captured as the (scaled) image on the screen itself, not the pre-scaled image rendered by the application. As long as you didn’t scale or lossily compress the screenshot, the issue would still appear.
And yes, in general, the scaling does work very nicely. The problem is with applications that don’t properly support it. I’m pretty sure the issue in Firefox’s case is that Firefox is still using GTK3, which never got the fractional scaling support.
Ah interesting. Have you tried in a non-wayland DE or WM? I’m in i3 and at this point I’m feeling like I’ve done too many taste tests and can’t tell the difference between if my text is fuzzy or not per application. Like I’m in firefox on this forum right now and I think it looks ok, but maybe it looks a bit blurry in Emacs… I guess the fact that I’m not sure is a good sign? Or that I’ve just gotten used to the blurryness.
Here’s Firefox:
Here’s emacs:
I feel like emacs looks kinda blurry, maybe just cause it’s a dark mode theme.
Here’s my xresources:
Xft.dpi: 120
Xft.antialias: true
Xft.hinting: true
Xft.rgba: rgb
Xft.autohint: false
Xft.hintstyle: hintslight
Xft.lcdfilter: lcddefault
XTerm*background: #222D31
XTerm*foreground: #d8d8d8
XTerm*pointerColor: #1ABB9B
XTerm*faceName: Fixed
XTerm*faceSize: 13
I tried sway on my fw13amd and had to leave it aside even just on the original display because of all the issues with per-application DPI, blurriness etc. One day Wayland, one day.
I haven’t used Xorg in quite some time (besides Xwayland), but I seem to remember not having any scaling issues with non-integral scale factors there. Wayland just has so many other advantages though that I don’t want to go back.