Pixel Track is a prototype connected display system. The display uses a mechanical ‘scanning’ based system for updating pixels. This means that the display consumes no power while it remains static. As a side effect, the scanning technology changes the pixel form and the qualities and behaviours of the sign change. The mechanical nature of the surface means there is room for great flexibility in the form and material qualities of the display.
From the same creators of the aforementioned Cloudwash.
Somewhat related: Twitter Split-Flap Display (video), a project some students of mine made.