Re: A phone comforming to the curve of your head
If the phone is bent that way, clearly it has to be flexible, because exactly no one would want a smartphone that is bent like that all the time.
Bent like what? It is a deliberately obfuscated photo that allows you to extrapolate several possible shapes from the information available. I can see three straight away: the most literal view would be that it is doubly bent and this a straight side-on view which seems improbable and doesn't it in well with the shading.
The second is that this is an edge-on three quarters view of the side and end of a shape that angles up at one end, kind of like how some calculators angle up the display portion of the case. That fits well with the photo but I don't see why you would want that shape in a phone.
The third and my preferred interpretation is that this is a straightforward curved phone with the screen side facing downward, taken from an angle to mostly show the top or bottom end and dramatically foreshorten the long side. I can see some people wanting that and can see some practical benefits in that it would allow you to more easily reach the top and bottom of the screen with your thumb.
In any event I'm now long past the point at which this descends into idle speculation as the author was careful to avoid. My essential point is that you don't know anything about the shape from that photo.
One final point that is easily missed - if you load it up in an image editor and start distorting the brightness curve quite dramatically you do bring what appears to be an edge button into visibility below the rightward portion of the horizontal bit, at least I don't think it's a compression artifact. That doesn't tell you much by itself but it does seem to eliminate interpretations that require a face-one angle of the phone.