Electronic paper (or e-paper) is a collective name for display technologies that offer paper-like performance - high display clarity and sunlight readability, and all that with very low power consumption (usually ePaper displays do not require any power while the image is not changing).
ePaper displays are found in many devices (most people will associate ePaper displays with e-readers such as Amazon's Kindle). Since 2019 or so, companies also started to produce e-notebooks, which are large tablet devices with ePaper displays, mostly used for note taking and reading reference books.
The Ricoh eWhiteboard 4200 is a large digital whiteboard that use a 42-inch E Ink Carta display with support for two pens. The device is waterproof, dust-proof, and highly power efficient. It weighs 5.9 Kg and is only 14.5 mm thick.
Fujitsu's Quaderno A4 and A5 (2021 edition) are eNotebook devices that sports large E Ink Carta displays - 10.3" 1404x1872 (227 PPI) for the A5 and 13.3" 1650x2200 (207 PPI) for the A4. Other features include Wacom touch support, a Cortex A53 chipset, 32 GB of storage and 4GB of RAM.
The tablets are now shipping starting at $570 for the A5 device.
The Geniatech KloudNote is a eNotebook device that features a 10.3" 1872 x 1404 E Ink display with pen input, an Cortex-A35 chipset, 2GB of RAM, up to 32GB of storage and optional support for 3G/LTE connectivity.
Dasung's Not-eReader 103 is a smart E Ink tablet that features a 10.3" 228 PPI 1872x1404 E Ink display, Android 9.0 OS, 4G of storage, a TF card slot and a fast Snapdragon 660 chipset. It supports both hand and pen touch.
Beyond its capacity as a tablet and e-reader, the Not-eReader can be used to connect to a PC or smartphone and mirror it as a mobile monitor.
Xiaomi's Ink Case Smart Electronic Paper is a large E Ink tablet devices that sports a large 10.3" 1404x1872 E Ink display and a Wacom stylus. The device is based on Android 8.1, optimized for electronic ink and has 32 GB of storage and 2GB of RAM.
The Ink Case SEP is now shipping in China for 2,499 Yuan (around $360).
The EeWrite E-Pad is an Android (8.0) tablet that features a 10.3" 1872 x 1404 (227 PPI) E Ink Mobius (flexible) display with front-light and touch support, a 10-Core Helio X20 processor, support for Wi-Fi, Bluetooth and 4G communication and 32 GB of storage + TF card support.