Of course there will always be situations where you want a larger screen for reading, data input, videos, etc. But accepting current folding devices as a necessary step towards something better isn’t a requirement. Manufacturers are already iterating devices that we never see, because they have issues they don’t want to release into the public. Apple is famous for doing this, which is why people always say that Apple fans hate something until Apple releases it. It’s often true, because brands who release things before addressing negative issues, often have negative consequences.
With regard to current folding phones, you have to be willing to accept a bunch of things not being available, that so many of us pushed for in our smart devices for years, like water resistance, drop protection, screen scratch resistance, battery life, one handed usability, etc., that just aren’t possible with current folding devices. I know Samsung worked really hard to develop the hinge used on these things, so that it remains smooth throughout its usable life, but they know that it is a mechanical device that will wear in a way that a non-mechanical slab phone doesn’t have to even consider.
I lived through the days of the Palm Pilots, Compaq iPaq (which I loved as one of the first real portable pc’s), and several Blackberry knockoffs I had where the screens all developed scratches within a year making them unusable as a touch input device. Apple introducing the first iPhone with the glass screen was a huge step ahead and here we are again with what are similarly damage-prone screens being touted as the next great thing. I’d take a two panel glass screen that comes together as a foldable if it had the rigidity that current slab devices have over the utg covered screens on the market now.
I also agree that the idea of a rollable screen should make more sense as a way of expanding a device, potentially far larger than what a single hinge can offer. But again, one big issue is that a mechanism required to make that happen, while providing a rigid and inflexible screen, would be unfathomably complex and/or heavy or thick, unless you’re ok with having a screen act like a window roller shade. All of that mechanism would need to be able to fold up into the device (and would then be another entry point for dust and detritus that could damage the device). Maybe these things will be resolved with new materials, quantum computing advances, etc.
And I’m not arguing that there isn’t a reason for a larger screened device, but rather the fact that doubling a smartphone screen may not be going far enough in increasing the screen size. I thought the flip style folding phone made more sense, because you could literally cut the phone height in half, and not try to make the screen larger.
Maybe the better solution isn’t to take a phone and unfold it to be a small tablet, but rather make a larger tablet that folds down to be a half-sized tablet. The benefit of doing that is tablets aren’t expected to have the same features that phones do, like water resistance, surviving drops, etc., and going larger with a device provides more space for battery cells too, which is another thing that we all want - all day battery life.