This bit doesn't deal with the M100, but...this board looks small enough to fit inside an old-fashioned (big) pocket watch case. If one could put a decent display on it, and maybe a very thin membrane keyboard in the watch's lid, it would make a very cool steampunk pocket computer.
I can't recall if it has bluetooth or wifi (I think it has wifi?), but with wireless, it could remain in your pocket while acting as storage for the M100.