It is. At least in the photos of the "pixel mirror" -- see your sibling comment, there are two objects being demoed.
In some of the examples it's hard to tell, you can work out the skybox[0] in the photos[1] that include the horizon.
[0] I found it amusing that this was the word I reached for here, so I left it in. A skybox is typically what is/was rendered in the background before the rest of a 3D (game) scene. I'm referring to the gradient between the ground/horizon/sunset/sky.
In some of the examples it's hard to tell, you can work out the skybox[0] in the photos[1] that include the horizon.
[0] I found it amusing that this was the word I reached for here, so I left it in. A skybox is typically what is/was rendered in the background before the rest of a 3D (game) scene. I'm referring to the gradient between the ground/horizon/sunset/sky.
[1] https://www.yankodesign.com/images/design_news/2024/07/weara...