I can think of two situations where this type of display may work:

A thin model with a large enough viewable area could be clipped to a laptop's or tablet's screen, for use outdoors. This sort of setup would be useful for field work.

A wireless model may be good secondary monitor for extended periods of reading, as well as to refer to or transcribing information. It would be more useful than an ereader since it would display information using standard PC software.