A couple days ago a Slack friend posted:
i’d love to have a digital picture frame on my desk that shows one calvin and hobbes cartoon per day
I think this is a brilliant idea. Not only Calvin and Hobbes, but basically anything you might see on a page-a-day calendar. Word of the day, New Yorker cartoons, inspirational quotes or fun facts. You could buy the device once, and purchase as many content bundles as you want. It would last for more than a year, but you could also switch up the theme more frequently. And since page-a-day calendars are traditionally black and white, an e-ink screen would work great for this concept.