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.
Why can't you run higher than 60hz on a C9 at UW resolutions? They can run 1920x1080 and 2560x1440 at 120hz of of a pc's hdmi 2.0b.
HDMI 2.0b is theoretically 18Gbps with proper 18Gbps cables but that might be pushing it.
3840x1440 ..100Hz 8bit ~16.59 Gbps
3840x1440 ..105Hz 8bit ~17.42Gbps
3840x1440 ..108Hz 8bit ~17.92 Gbps.
3840x1440 .. 110Hz 8bit ~18.25 Gbps
3840x1500 .. 98Hz 8bit ~17.50 Gbps
3840x1550 .. 100Hz 8bit ~17.86 Gbps
3840x1600 .. 98Hz 8bit ~18.06 Gbps
That doesn't mean that the C9 OLED TV's would accept and display the signals properly and with VRR or that games would support some of the non standard resolutions - but it would be cool if a C9 could do a 8bit x1400 or x1600 UW rez at close to 100hz for now. Maybe someone could test it out at a few of those custom resolutions on a C9.