All set aside, I did always wonder, why the screen has to fold (be flexible), surely a very thin line between 2 hard screens is very workable, perhaps it is even possible to make it (almost) invisible with some optical tricks at the touching edges.

Another point: It is easy to think of such things, it's the manufacturing and specifically manufacturing at scale that is the real work. That's why I think patents can really hold us back, by blocking the market from trying stuff because a company made some nice drawings (coming from a guy that was in a company that wanted to "blanket some markets" with patents). Perhaps we could have had our flying cars ;)

Btw, that last slide is very much like the communicator from Earth: Final Conflict [0], but then again, what can you make with a rolling screen?

[0] https://earthfinalconflict.fandom.com/wiki/Global