The Sony tablet with an E-Ink display that was recently spotted on the FCC website has the model name DPT-CP1, so it is probably a successor to last year's DPT-RP1. Made by Netonix, this slate features WiFi, Bluetooth, and NFC, but the FCC listing does not reveal any of the main technical details. However, the document confirms that this device has reached the mass production stage, so its launch is imminent.
https://www.notebookcheck.net/Sony-digital-paper-device-with-E-Ink-display-hits-FCC.288982.0.html