E-Ink Displays
E-Ink displays are mostly relegated to 6-8β screens on book readers, but have some applications in signage and ambient displays. They are purely reflective, blending into the environment instead of emitting light, which makes them great for reducing eye strain.
Visonect makes a 13β battery powered display for offices, with a content management system for remote updates.
Itβs possible to repurpose an e-reader, which tend to have screens with higher refresh rates, as a terminal emulator.
Some people turn the larger 32β displays into newspaper viewers.