The idea of adding an E-ink display to chess computers is nothing new. The DGT Centaur is the perfect example for that. The Certabo Nano happens to be an e-paper chess computer module with a quad-core 1GHz processor and 512MB RAM to run the Maia chess engine, which is a neural network based chess engine. You can use this to also view analysis as you go through games.
The Certabo Nano is useful for opening training. It works with a Certabo smart board, so instead of buttons, you can simply change settings with a queen or kings. It has a Micro SD slot for upgrades.