Apple has patented displays integrated into the fabric
Apple has patented technology to integrate displays of light-conducting fibers in different fabrics. The material has many uses, but is most likely to be used in future versions of Apple Watch. The device combines a fabric with optical fibers, which can not only transmit the light but it emits. In this way they can both illuminate the entire strap, and only parts of it.
Strap display could show notifications, device information, or an indication of whether the strap is buttoned properly. The latter is described as a scenario of use of the patent documentation. Apple mentions several times and possible use in “portable devices capable of displaying the time” and “electronic watches.” It is possible the patented technology never to become part of the real product, but it is clear that the company experimented with new ways to expand the possibilities of Apple Watch.