I purchased the 55C7 Saturday from Value Electronics in NY, met Robert and his wife, very nice peeps and I am using it exclusively for games and using my Leo Bodnar tester the C7 will do 21.4ms in pc mode with game picture mode and HDMI deep color mode on for 4:4:4, this is a massive improvement over any 2016 oled imho.
Everyone using the C7 for games need to use PC mode with game picture mode and deep color enabled as this gives the clearest and lowest lag possible on the tv, no need to use game mode outside of PC mode due to 4:2:0 in that mode.
Also I have to say with oled light at 35 which is what I used on my 65B6, the C7 is almost blinding with full screen content, NO noticeable ABL anymore, thank God!!!
2017 LG oled's are a major improvement for gaming versus 2016 ( I had a 65B6 and a 55E6).
Main improvements for gaming that I have seen:
1
much lower lag 21.4ms by my Leo Bodnar
2
significantly less lag with 4:4:4 in pc mode, 21.4ms!!
3
NO ABL
4
Massive improvement in uniformity, no vignetting, very minor vertical banding, 80% improvement over the 2016's and I honestly couldn't stand the uniformity on the 2016's.
5
No more magenta tint anti glare filter, now looks jet black and really improves contrast
6
Undefeatable edge enhancement is now gone, 2016's had edge enhancement that couldn't be turned off even at sharpness at zero, with 2017 the sharpness at 10 gets rid of edge enhancement and has no added sharpness, so a pristine image that when using for pc monitor and gaming is very noticeable!
7
120hz native at 1080p! Will try other resolutions, looks like I can get 4k native at 120hz at 4:2:0 with custom edid in Nvidia control panel !!!!
Any questions let me know!!