At the risk of sounding churlish...
...given how remarkable this tech already is, I assume this isn't a touchscreen, is it?
Researchers have developed a display that folds in half without a visible crease, paving the way for a range of foldable mobile concepts to become reality. A team at the Samsung Advanced Institute of Technology in South Korea have built a prototype of the screen, publishing the results of their work in a recent issue of …
Depending on the tech, of course. Most touch screen tech would be able to sense a finger on the fold, even if there were a gap in the actual sensor(s).
A full touch-screen flip-phone, now that would be fun. Or a 'mini-tablet'. Or for a laptop, a fold-out widescreen display. Or a double-height tablet... complete with touch keyboard, that would be pretty cool, actually. You could read eBooks that look like, well, books! :-D
http://www.theregister.co.uk/2009/06/04/new_flexible_oled_displays/
The Sony version of events looks rather cool. There's a vid somewhere of one of these screens being repeatedly rolled around a pencil-thickness rod, while active and displaying a movie.
a screen that you can roll up. Say, to the range of diameters of your forearm from wrist to elbow. There are already materials which, with the controlled application of a current, will take a particular shape - effectively, 'remembering' a particular state and returning to it. The folding business is perfectly suited, though, if we park our brains in pockets.
Anyone else remember the time travel TV movie Thrill Seekers from 1999? A mostly mediocre affair in almost all departments, but I do remember the agents had these rather cool tablet computer / video phones that folded in half when not in use, kind of like a book-fold iPad. Give this technology a few months and they could be a reality.
http://www.youtube.com/watch?v=-_m8SGnUp7U#t=1m39s
Well, all except for the bit where they get messages from the future. I'm not sure even Apple's R&D budget stretches to that.