What is the utility of it, let alone the durability? And why does that last rendering show a display on both sides of the phone?
Japanese tend to love new gadgets of questionable value just for the novelty. Most of them never see the light of day in the US.
If they can fold like paper, you could have larger screens than can be folded to fit in your pocket. You might be able to have screens, when unfolded that might be 8”.