Dave 2d applied screen protector to half of the 512gb oled screen. Huge bubbles aside, it showcases how matte screens destroy colors.
The light hits the matte screen and is diffused/trapped by it's groves making the screen seem more washed out because it is. Because it absorbs some light, in essence, the screen coating is washed out because the coating itself is "Bright". I've been mentioning that for years.
It is especially evident with oled becuase of higher contrast and pure black levels. IPS monitors are already grey/washed out in black areas but when I had glossy ips monitor, it still looked much better than matte crap.
There is a middle ground with LG oled tvs. The coating is glossy but does not reflect like a mirror. The reflections are sharp but a bit dimmer. Not a problem at all.
here is the vid