See the video after the break.
At post time, there isn’t an official Xiaomi YouTube video, just rips of various quality. This is one of the better rips:
So, the screen doesn’t go off when folded back. It just trims the image to the remaining portrait area.
It looks to be a half-inch thick. Is that too much?
I wonder how much stress that screen can handle before material fatigue causes cracks? Well, with Samsung likely to introduce such a phone to the mass market first, we’ll know soon.