I'm still doubtful about the usefulness, though. Does it support the S-pen?
I suppose they made it fold to the inside because their display technology limits them to it (even though intuitively I'd expect the opposite to be true), I would find it folding to the outside much more useful, since this thing you'll have to unfold to (properly, the outside screen is quite small) to use, but then it becomes a tablet ...
So far I see it mostly as a technology demo. I'm glad that manufacturers are actually selling them, though, it gives a good feeling of the practicability and readiness of the technology (and something for rich hipsters to buy).