Looks like finally the big sized 21:9 ultrawide monitors are going to offer gaming specs, on par with the best panels, LG is launching its new Nano IPS panels line.
34 inch curved, 21:9 UltraWide LED Nano IPS, QHD 3440 x 1440, nVIDIA G-Sync 120 Hz (or Radeon Freesync 144Hz , LG 34GK950F model) Sphere Lighting, Multitasking, 1ms declared response time (Freesync model only) , covering 98% of the DCI-P3 color space.
And the incredible LG 34WK95U, a 5K panel with HDR 600:
34", 21:9 LED Nano IPS, HDR 600, 5120x2160, 5ms, Multitasking, Thunderbolt 3 Port (85W - 40GB/s) , 98% of the DCI-P3 color space.
Unfortunately these are not cheap monitors, hopefully going down sometime later.
I have a 21:9 monitor and it’s great. Easily handles the same stuff as a dual monitor setup (Windows Key+Left/Right for split screens) but without a bezel (nice for spreadsheet work). Only caution is Overwatch (maybe some other competitive / eSports) doesn’t really support 21:9 (you either get black bars on the sides or it lowers your vertical FOV so you get owned by characters on the high ground). I ended up setting the res to 1440p and configuring my system to stretch the screen horizontally. Looks really weird (all avatars are short and fat now) but makes headshots easier =/
True, unfortunately not all games and developers add 21:9 resolution support to their games, probably due to the still low adoption of these screens, but all the serious racing and flight sims games I have tried support it and it really makes a big difference to have such a wide view, FPS games supporting it benefit from it noticeably too.