There is a massive ribbon cable coming out the bottom. He could have contracted a few samples from an OLED manufacturer or it's a component to a commercial product not available for sale.
You’d think something like this would be major tech news, people have been talking about this tech for ages and a consensus for many is that it wasn’t impossible. (Look at all the crap foldable phones)
It’s objectively not cheap but it’s not expensive for such revolutionary tech.
Without additional information that seems more likely but its at least portrayed here as a real display.
It would still be a very interesting idea to rather make everything a display make everything a zero energy AR surface but then we need convenient mainstream AR wearables.
We've been seeing this tech for 10+ years slowly progressing to the point of commercialization, and finally the release of foldable phones and curves displays.