LG has stated that they don't have much interest in chasing even lower input lag because it is already very low. I really doubt you will be able to feel the input lag on a C9. You have to remember that pixel response time plays a factor for this as well and since it's consistently sub 1ms on OLEDs, you can basically say that input lag is pretty much all you get. On LG C9 at 120 Hz the input lag is 6.6-6.8ms for 1080p and 1440p. That's less than 1 frame. 4K @ 120 Hz we will know when HDMI 2.1 GPUs become available.Interesting. I also have this monitor but have been thinking of getting another Oled like waiting for the CX.
But I do alot of competative gaming, like PUBG. The inlut delay of this Asus is very good for that, extremly low, will I feel the longer input delay of an Oled TV like the C9 or CX which I assume will be either as good as or better than the C9 in that regard?