Delta Electronics is showing some new e-paper displays prototypes sized 4.1", 8.2", 13.1" and 21" (A3). They are using Bridgestone's AeroBee technology - which results in power efficient, reflective, touch enabled color e-paper panels. The 21" display weights less than 2Kg and can be used in billboards and large-size display projects. Delta is also working towards a solution for interactive learning - and will present a device aimed for schools in first half of 2012.
Bridgestone themselves unveiled 21" panels back in April and the company also plans to market their own panels apparently.