I think it depends on what you're looking for when you say 4K.
There's panels like the LG 38GL950G, which is 3840*1600. You're correct in that it isn't "true" 4K or DCI 4K.
No ultrawide will be in the expected 3840*2160 resolution, simply because of the aspect ratio.
So you'll either have to look for something like the 38GL950G, which is 4K in the horizontal dimension, or something like the LG 34WK95U-W, which is 5120*2160, which is "4K" in the vertical dimension. (and 5K in the horizontal).
To help the rest of us make better suggestions, can you elaborate a little more on *exactly* what you're looking for?
Balletje72 reacted to LyondellBasell in Why are there no curved ultrawide monitors with 2160p height?
