These panels are a very cinematic 32:15 (approximately 2.13:1).  I suspect that, as with cellphones, the bi-fold will die, but the atomic aspect ratio will survive.  I’ve sat in front of a 2560×1200 editing station before and really liked it.  It’s not hard to imagine a future in which such a resolution exists in the 7-8 inch range, giving us a device that’s nice and long for text, nice and wide for video+controls, easier to jam into a pocket because it’s relatively “shorter” than a “widescreen” display of equivalent width (meaning “thinner” in the pocket), and will be much easier to use with just one hand.  I also suspect that as “augmented reality” applications take hold and accelerometer sensors improve, svelte devices like will have us swiping them across our field of vision at arm’s length to see what curious pieces of information pop up about our surroundings.