Burn risk is real, sure. I've had 1200 hours on my lg c1 (since march yikes) and had no visible signs of usage. I did had to warranty replace the panel because a stuck green pixel appeared on the middle but that can happen on any tv/monitor.
And honestly I do not care. i will take the burn in risk any day over worse lcd qualities. The size, black, uniformity and awesome hdr is just nice.
I plan to put this tv in my living room to replace 2008 bravia and get c2 or whatever next best thing next year. if burn in happens in 3-4 years, I don't care. I have wallpapers set to change ever 1 minute and black screen saver ever 2 minutes.
As for pixels - I am really surprised and I am not lying. the extreme pixel density of 27" 4k was the reason why I loved it. Everything looked like vectors on it and I avoided last year lg 48 cx because I was afraid of ppi. But I risked it this year and 4k at 48" looks.... honesty nearly as good. Look at the pic from my sitting distance. It's not bad at all. I cannot see aliasing of text or pixels sitting like in the first picture (sitting normally at a desk, using mouse and keyboard). Maybe because there are 4 sub pixels and not traditional 3... or because thes are not square.
it looks worse in the picture. Oneplus totally destroyed the camera quality with new updates...