The PQ EOTF tracking on the LG QNED80 2023 is decent overall. Shadow details are raised significantly and look washed out; this has more to do with its low contrast ratio than its HDR processing. Midtones are slightly dimmer than they should be.
Content mastered at 600 and 1000 nits hard clips when the TV reaches its peak brightness, leading to a loss of bright detail, although this TV doesn’t show any truly bright detail anyway as it’s just simply not bright enough. For content mastered at 4000 nits, there’s a smoother roll-off, and fine details are preserved.
The graph above is with local dimming set to ‘Off’; here’s what the PQ EOTF tracking looks like with local dimming set to ‘High’. It’s significantly more accurate than with local dimming disabled, but unfortunately, it comes at the expense of massive blooming and distracting lighting zone transitions.