There are only a few 13.3 inch e-readers on the market and most of them have the same resolution. New E-paper has just been developed that will allow companies to be able to offer better clarity when reading an e-book or editing a PDF file.
E-Ink Carta 1.2 technology (high contrast and short response time) will be able available in a plastic substrate or with a glass substrate. The resolution will be dialed up to 2200 X 1650, which is about 205 PPI.
This new e-paper will be available will be commercially available in Q4 2016 and will should start seeing e-readers employing this technology in Q1 or Q2 of 2017.