Look the folding and bendy plastic display screens are not new tech - Sony from 2009 and it may be even earlier examples,
Bringing it to market seems to be a whole other ball game and who can do that and win?
+ Why replicate the shortcoming or practical impediments of old-world bound media aka, books!
It actually make no sense of than the folding to save space, but is that enough of a sell, since some screen tech was designed to roll up so you could have it in a pen if you want, a digital scroll!
If anything what would be great and afaict - APPLE are best placed to do something like this, having more than one iOS device work in tandem with another... designed a new custom hinge-connector system (use the triple dot connector) and you have a dual screen book like offering, one side can be a keyboard when you need it.
Two iPad pros working as one or with your macOS system. You could build out a new control desk in a sound studio. Keep adding iPad Pros etc. etc.
I think this might be the Apple kind of
other modular with might seen soon. I hope so.
It opens up bigger potential and applications in the real world. When the screen have less or no bezels at all, build your own video touch wall, room, floor... limited only by how deep your pockets are.