Stuff magazine received a demonstration at IFA 2012 in Berlin of a smartphone with two screens; a LCD display in the front and a low-power E Ink screen on the rear. E Ink has only just shown the prototype to phone makers and one anonymous cell phone maker is reportedly working on installing the second screens already.
"Why do I want two screens?" you may ask. Because E Ink displays – featured in the likes of Kindle and Nook readers – are so low power and super thin they’re ideal for reading on your phone without using much battery.
t’s also a great safety net as you can leave an image on the screen, even after your phone dies – perfect for displaying, say, an airline ticket when your phone's running low on juice.