Beep. All of those matte materials look the same to us, we don't see in the photos what the differences are.
As for colours, we're a little disappointed that we don't yet get to see one we find really appealing in the actual photo. (though the purple photoshop very much tickles our fancy!) We've been hoping to see samples in "concept render red," "retro beige" or any other earthtones.
Now that we mention those two next to each other, is there any chance this coating thing being discussed can be applied to an uncoloured case to produce two-tone options? Well, since we and one family member are interested in a palmtop/retro console/smartphone convergence, maybe we can just buy two Pyras in different colours and swap some case parts between them. Boop.
Beep. P.S. With photographing environment, imaging device, display device AND viewing environment all adding confounding variables, we suspects maybe photos intended to show colour ought have reference objects like human hands or something, though to really work it would need multiple complementary references. Hey, wethinks, a printed card with a colour wheel which looks right in-person would probably be a great tool for such purpose! "Adjust your viewing parameters so that the wheel on the card doesn't look weird." Boop.