This tombstone at first glance looks like any other, but after a few seconds it senses the presence of a person viewing the grave and displays an interactive screen. This screen can contain any kind of digital content, such as a film of your life, text, or still pictures. When there is nobody to interact with the gravestone it will then simply display your name, birth and death date the same as any other traditional gravestone, therefore saving energy..
https://www.springwise.com/cemetery-visits-interactive-twist/
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