Cool device when we can buy it Really don't know
“…Fujitsu has introduced an e-paper-based display. It features a 7.8” diagonal and 4K colors.The device weighs surprisingly little—mere 180 g. This is achieved due to a plastic substrate instead of the traditional glass used in LCD. As for the reader, it is equipped with a USB-connector and an expansion slot for SD cards. The reader is firm enough, so the advantages of the flex display can be used in other applications. The company hasn’t unveiled details on the release of the display or the reader, so far.” - MobileReview