Re: folding away
"That aside, all of this strikes me very much as gimmicks in search of a problem to solve, and by that I don't mean "how are we going to convince people to part with their money again". What is the point?"
The point is a decently large screen which still manages to fit in a pocket. It may also be the early, baby steps, towards fully foldable devices. eg a roll up screen so you get a phone that's little more than a tube in shape until you pull out the screen. Or maybe a pair of tubes you pull apart to open like ye olde fashioned scroll.