Re: It would be great if it doubled the display area
"and nothing anyone watches fits in a square."
99.9% of what I "watch" on my smartphone will work in pretty much any existing screen shape/ratio.
In fact, I would happily accept a far, far cheaper foldable phone that just puts a screen on the two halves of the clamshell and didn't worry about the screen itself being foldable. A "border" up the middle would not be an issue for me in the same that two screens on my PC is acceptable instead of one enormousness screen.
Biting the hand that feeds IT
