This. Such devices have been on the market for years. I've owned an Onyx BOOX Max Lumi (13.3" e-ink Android tablet) for nearly 3 years now. Monochrome 16-sha

This. Such devices have been on the market for years. I've owned an Onyx BOOX Max Lumi (13.3" e-ink Android tablet) for nearly 3 years now. Monochrome 16-shade greyscale (with dithering for better presentation of images). It's excellent for reading straight text, line drawings, and most webpages, though a pagination-based navigation is much preferable to scrolling. Refresh is ~8--16 Hz, though that varies by display mode. It's possible to view video on the device, though you'd generally prefer not to. Animations are generally annoying A.F.