Hoped For: * I don't like split monitors, so just one big one * I don't like "curved" screens; they're hard to have another person sit by you to show them stuff * I'd rather be < $1K
I downsized from a 16-year-old Dell 3007WFP with two bulky 24' monitors, so a refresh was overdue. Although I enjoyed my old setup, I wasn't sure if I'd get used to a single monitor, but it was a great choice in the end.
The 4021QW has a decent size and resolution (5120x2160 @ 60Hz), Thunderbolt 3, a minimal 2500R curve (I dislike curved screens), great color accuracy, and the pleasure of not having a bezel and moving apps between monitors improved the experience in more ways than I expected. It also allows seamless switching between an MBP and a Linux desktop (although I use a separate KVM and not the one embedded in the monitor).
It's not perfect, though. I wish it were a few inches taller and wider, and that it had HDMI 2.1 ports (only the DisplayPort supports 60Hz; the 2x HDMI are capped at 30Hz). I also would prefer something brighter (300 cd/m² is not too great, particularly as I use DarkMode a lot).
edit: the other thing I did was to get a nice Ergotron arm monitor. It's a fantastic experience to have a big monitor floating in space, without being tied to clunky monitor stands.
That said, I am in need of an upgraded computer...
Edit: I forgot to mention that it can be split up to 4 separate FHD screens like I currently have it (for easy window snapping), with 4 separate inputs if you want.