Camera with reflective display?

Reflective / transflective displays have the advantage of being visible in bright sunlight.
Despite them being black and white, I am curious whether they are used in any photo cameras.

Haven't seen them so far. The reason why they have not caught on with mobile devices is that everyone wants to stream video, and these devices cannot handle the high refresh rates for video. A similar consideration may apply for live view, which has replaced optical viewfinders in most modern camera designs. A camera with such a display might have to have an optical viewfinder, essentially be an SLR when manufacturers are moving away from the bulky, heavy SLR design which is seen as a legacy of the film era.