As forum member Phogg explained in "DaSung Second Screen 13.3" E-ink Monitor" thread:
https://www.mobileread.com/forums/sho...=Dasung&page=2
"The big bottleneck in screen refresh is the controller, not the e-ink screen itself. E-ink demonstrated video capability years ago.
Book readers focus on power saving measures to help achieve long battery life. A diametrically opposed goal if you want video."
http://www.e-ink-info.com/6-e-ink-pe...cale-imx50-evk
http://www.e-ink-info.com/project-vi...-ink-prototype