The Eewrite Janus is a dual-screen Android tablet. Taking after the Roman deity with which is shares a name, the Janus sports a high-resolution LCD panel on one side and a Carta E Ink display on the other. According to the pre-order page, the 1200x825 E Ink display also support Wacom styli, which may make the tablet a good tool for sketches and note taking.
https://www.notebookcheck.net/Business-in-the-front-Janus-Android-tablet-has-E-Ink-on-one-side-color-LCD-on-the-other.420455.0.html
This is not up for preorder, as it is being offered on Kickstarter - which has a few "limited 43% off seats". Ogadget doesn't even have a listing for this, which is a bit misleading.