"Fits the hand better" is more to do with a curved back than a curved display.
True.
I just don't see the benefit of this particular test. I can see the benefits of flexible but not rigid curved devices.
Mildly disagree. I have a Nexus with the (vertically) curved glass front, and it feels nice under the thumb. It's a thoughtful design touch (no pun intended).
A rigid display that curved over the top would be handy to me, as I often have my phone in my shirt pocket. I could just glance down and see who's calling, or what a vibrating alert was about. Or you could pull it just enough out of a pants pocket. Of course, a second tiny LCD display would work, too.
Neither's a big deal, though.
With a flexible device: -
- you could have a device with a customisable screen size, and you just fold it out to whatever size suits for a given purpose.
Yes, I think I would actually line up for a fold out phone-tablet
Cheers!