The folds look interesting. I'll keep an eye on their evolution as eventually I might want one. I'm very obsessive about keeping my phone in perfect condition so I'd be afraid to open it as often as I would but maybe if they did made like a book tablet type thing more for long periods of reading and watching stuff... I miss the feeling of holding a book when reading in my tablet. I'd be worried about not having a protective enough case though. My current tablet weighs a few lbs just because I have such a huge case on it lol...
Yeah honestly the only down side with books is the size and weight. I travel a lot and travel light so this is very important to me. For example I can have 50 chapters of manga on my phone whereas you would need a whole suitcase to carry those.