I know of CyberBadge from Poland, which is making a very primitive version of what you're describing. They don't have a screen, just an array of programmable led lights. People use them at events. https://cyberbadge.net/
So make this type of thing work across time and you have created value to someone, which means a marketable product, at least in the Slashdot sense of ?, ?, 3... profit!.