What kind of PC would you need to run that?
At this resolution? As already mentioned above, any decent GPU can run it provided you've got the monitor for it. UWQHD is quite demanding however, only a couple hundred pixels short of 4K.
The true measuring of a UWQHD is the FPS. You'll need a pretty high spec'd GPU to have run above 60fps with the highest settings at the full resolution.
I may be in the minority, my setup is an 8700K+1080Ti. Monitor is 100hz Ultrawide GSync.
It's great to see The Twist supporting UWQHD, however this demo is static. Whether its supported on an actual fully playable build with the live panning camera without tanking performance, we'll have to wait and see.