In the post there's a linked yt video which has a showcase of the technology and if you skip to 03:40 you can see it being used with a flexible OLED screen to enable (iOS) buttons which physically deflate when pressed. Pretty cool if you ask me.
Really nice to see an actual end-user application for a technology like this and this one was quite impressive. I'm sceptical that it'll come to market this way since the durability of this application seems very low with no protective hard layer. Looks really cool though!