CNet:
Lenovo always seems to have a couple CES products that think totally outside the box, but this is more literal than I'm used to. On the cover of the 13.3-inch ThinkBook Plus is a secondary 10.8-inch e-ink display "on which users can create illustrations and diagrams with the integrated Lenovo Precision Pen and receive essential notifications when the lid is closed allowing them to stay focused during meetings."
...
Aside from the e-ink display, the ThinkBook Plus is a fairly straightforward 13.3-inch ultraportable business laptop.-Up to 10th-gen Intel Core i7 processor
-Integrated Intel UHD graphics
-8GB or 16GB of memory
-256GB or 512GB M.2 PCIe SSD
-Full HD display with 100% sRGB color gamut coverage
-Power button with integrated fingerprint reader, webcam privacy shutter and TPM 2.0 for security
It's finally safe to doodle in meetings again.
(Score: 5, Informative) by Immerman on Wednesday January 08 2020, @03:31PM
E-ink doesn't have a refresh rate, and can actually change substantially fairly quickly. It's the controller and driving matrix that determines refresh speeds - and e-ink readers are typically heavily optimized for low energy consumption and price, and typically only update one line (or even one pixel) at a time. But even without any optimizations you can play back video: https://www.youtube.com/watch?v=0OE3tHEmGug [youtube.com] (I've seen much better responses times, but that's the first example I found.)
And drawing has the advantage that there's only a tiny area updated per fraction of a second, with nothing needing to be erased, so you wouldn't get the ghosting you see in the video.