[Pitarou]

I believe the video is mostly concealing one important fact: the resolution in the z-axis is very low. That's the only way to explain the fairly high-res images in the demo when there are only 2 million voxels.

I'd guess the device is made of something like 20 stacked panels, each with a 300 x 300 resolution.

[DougWebb]

On some of the images you can see the layers; it looks like there are 10 of them. So the resoultion is more like 600x330x10.