To follow on from my previous post, I was curious to figure out what this sharpening setting on the LG C1 is actually doing. It appears that when going from 0 to 10, it's adding a sort of anti-aliasing like edge enhancement. Any additional sharpening above that then adds on the traditional kind of image sharpening you'd expect.
I am guessing that 0 is, in fact, the neutral image without any sort of processing, as you can clearly make out the 2xMSAA pattern in God of War HD Collection here. Image on the left is sharpening set to 0, right is set to 10:
(any differences in brightness / color are because I had to use Photoshop to adjust the image brightness afterwards, since these are camera shots of the screen - otherwise you can't capture what processing the TV is doing)
I think this anti-aliasing effect is most visible at the rock curve near the bottom of the image. It looks a lot like when you add SMAA onto an edge with MSAA already applied.
There is some speculation online that leaving sharpening on 10 doesn't affect 4K content at all, which makes it all the better to just leave it at that value to enhance any sub-4K content. Some purists might argue that leaving it on 0 is more accurate, which is technically true, but I think 10 is a clear winner. Like the My Life in Gaming video said, people spend $100 on mClassic cables to do what their TV already appears to do just as well.