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I figure they tossed it into a laptop because its what Lenovo is most well-known for producing. Its a prototype tech demo, definitely cool looking but clearly highly impractical.

It did remind me of "switchable glass": https://www.smartglassinternational.com/electric-switchable-...

But as an aside, the development of Micro LEDS is pretty interesting, I've never seen it in any prototypes before.

Yeah, having this e.g. on a window, or on a mirror, or anywhere where being able to pop up a display might be awesome but having a permanent black rectangle would be ugly would be great, but for a laptop it's a gimmick.

Expect to see a variant in a few sci fi movies and for it to not be seen again.

I've knocked over a couple of cups of tea/coffee hidden behind my laptop in my life(usually while pushing my laptop back to make space for something on the table), and wished the screens were a bit less obscuring ...

Coming soon to a Samsung refrigerator near you.