Yawn. Get on with the times. I've been using ultrawide (21:9) for years, and would definitely not want to go back to peeking through a square'ish hole.
UW is fine if you’ve got a 28” or more desktop (or maybe larger even), but I’d take a 28” 3:2 like the Huawei Mateview over a 28” UW any day of the week. The UW probably has 20 or 30% lesser screen area.
Ultrawides only start to make sense at about 34" and up, corresponding to 1440 pixels vertically. Anything less than that would be worthless for productivity (ie. not movies or first-person gaming) given today's UI trends of massive horizontal bars/ribbons sized for small touchscreens.
Likewise, a monitor in portrait usually needs to be at least 1200(w)x1920(h) (ie. a 24" 16:10) to be usable for browsing today's web without getting served up a mobile-specific layout too often. A reasonably-sized 1080p display in portrait can be great for stuff like text editors and terminal windows.
