For the record, Apple began pattening technology for folding phones 5 years ago.
It's... interesting. But I think the most I can say is that I'm curious. Curious to see the application of the technology and real world use. 4.6" display when closed seems small, but I dont know that I'd want to open it each time I wanted a larger display. And I cant think that a square aspect ratio is something Id think of as what I'd want to use, because multi tasking would then look like 2 side by side phones.
This article doesn't mention the thickness when closed, which makes me wonder how brick-like it could be.
That said, I give credit where its due, and Samsung has taken a risk here in an effort to push the industry out of stagnation. Good for them.