According toETNews, the two Korean companies showed off their new tech at theGlobal Tech Korea 2021event.
However, the stretchable screen does make the video lava seem more realistic as it flows.
The earliest concepts were shown back in 2017, albeit with a smaller 9.1-inch display.

LG Chem
The company is well-known for foldable smartphones like the Galaxy Z Fold 3.
LG claims that this material will reduce the folding crease on displays.
LG plans on mass-producing the Real Folding Window in 2022, but wont start selling them until 2023.
The company plans on taking this new screen to laptops and tablets.