E Ink announced that it will begin to produce 13.3" 1200x1600 plastic-based flexible E Ink panels (called Mobius) in 2013. Those Mobius panels weigh just 60 grams and will be much more rugged compared to the company's glass based panels. The panels use Sony's flexible TFT technologies (that were transferred to E Ink for the production).
Sony already unveiled a prototype tablet that will uses those displays. This tablet is aimed towards the educational market and Sony hopes to launch it by March 2014. The prototype device uses a touch display (with stylus support), 4GB of memory (with microSD) and Wi-Fi. The whole device is just 6.8 mm thick and weighs just 385 grams.