3440x1440 gaming on the Radeon RX 5700 XT is a great combination as AMD's new Navi-based Radeon RX 5700 XT beats NVIDIA's new GeForce RTX 2060, the new RTX 2060 SUPER and comes close to the higher-end RTX 2070 in the 21:9 aspect ratio. At least in everything but Shadow of War, which the RX 5700 XT loses to the RTX 2060 SUPER, but still beats the RTX 2060.
Not bad for a card that costs $399, and with more and more affordable UltraWide monitors at 3440x1440 @ 100Hz being available, it makes for a potent combo in RX 5700 XT + 3440x1440 @ 100Hz gaming monitor.
MSI's own Optix MAG341CQ gaming monitor offers 3440x1440 @ 100Hz FreeSync for just $429, so mixed with the $399 for the RX 5700 XT we're looking at $828 for a damn good gaming experience. If you're more into the single player gaming side of things then a 21:9 aspect ratio monitor is a huge new window into your games if they support the 3440x1440 native resolution, mixed in with a Radeon RX 5700 XT and even a new Ryzen 7 3700X and you've got a very, very potent UltraWide gaming experience.