Hi there, it's been a while.
I've noticed some posts regarding PC mode and games. From what I've experienced over the past couple of months, the input lag in Game Mode is low enough for a responsive and enjoyable gaming experience. Re-naming the input to PC (select PC from the input list, do not manually re-name it) cuts down input lag even further. Initially, I did not notice the difference, until I started playing Halo MCC a few weeks ago, and I felt a subtle but appreciable increased responsiveness when aiming around rapidly. The only drawback for PC mode is that colors become a little less "punchy", and most picture settings get disabled. The pictures looks slightly less polished and a only a little washed out, but still looks great.
On LED/LCD TVs, switching to PC mode makes the picture noticeably washed out to the point where PQ can look horrible (one that I wouldn't play on). The good news is that, thanks to the perfect OLED black level that creates an incredible contrast, the picture in PC mode on OLED does not look as washed out as it does on LED/LCD. I don’t feel I’m missing much on colors when gaming in PC mode but I sometimes switch back and forth between the two modes (depending on the game I’m playing).
In summary, PC mode cuts down lag even further to a tangible level for regular gamers (especially in FPS), but it comes at a slight penalty in the form of less punchy colors. I believe the difference in input lag between Game and PC Modes would be noticeable to the regular gamers, but casual gamers probably wouldn't notice it.
Just my two cents.