While Sony occasionally dabbles in eReaders (such as the PRS-T2), its latest e-ink device does not actually aim at bookworms-- instead it goes students wanting a "digital paper" notebook replacement.
Currently in prototype form, the yet unnamed tablet features a 13.3-inch 1200x1600 e-ink touchscreen roughly the size of regular A4 paper (minus margins). It also includes a stylus, making it ideal for note taking and PDF annotation.
Inside the 6.8mm thick frame are 4GB of on-board storage (expandable via microSD slot), wifi radio and a battery Sony claims powers up to 3 weeks of regular use, making a device weighting all of 385g.
Sony plans to commercialise the tablet sometime in fiscal 2013, following late-2013 trials in a trio of Japanese universities.