However, as us ultra wide gamers all want to do, we want a 21:9 aspect ratio. I custom resolutioned 3840x1400 and it worked well. I booted up a game and noticed I fancied a bit more vertical resolution, so i bumped it up to 3840x1600 and its felt nice. It only runs at 60hz until we get HDMI 2.1. However the ability to actually customise how much vertical real estate I want, and therefore be able to adapt my FPS to the actual resolution meant even high end games were easily playable at 60fps. Basically, ultrawide works and it works beautifully but at a cost of no high framerates for now.
BTW, a mention of the black bars. The black bars are a non issue at the bottom as that would be space where a normal monitor's legs would go. Instead you just get a seamless looking piece of black glass. It looks good. They just look like huge bezels because the pixels are actually off. But whats sweet is these are optional bezels that with an adjustment of a resolution slider, you can fill with goodness.
For high refresh gaming, you have to run at 1440p@120hz. I tried this and due to the size of the screen, you can't be a desk gamer and need to move a bit backwards (maybe 2m). With Nvidia sharpen activated, its beautiful.