There are multiple transparent lcd (or maybe led - idk) screens layered on top of each other. A different image is rendered on each layer to appear 3D. A single 8k video stream is sent to the display. Each 8k image is subdivided into multiple smaller images, one for each layer. So the entire image is 8k, not 8k per layer.

I know one of the cofounders, Alex, a bit. He’s a really earnest and excited person. He’s been working on 3D led tech for a long time. It’s been fun to see how’s his ideas have progressed. I have no reason to doubt their claims.

FYI, they are not the only company working on these types of displays. There is also an Irish company (I forgot their name) working with panels made by Panasonic. I think theirs are higher res than 8k.