I rewrote the UI for an off the shelf WiFi digital photo frame so that it shows the latest raw images sent back from the Perseverance Mars rover.
https://prbs23.com/blog/posts/picture-frame-from-mars/
The picture frame secretly ran Android under the hood. Which meant I could replace the app which showed pictures pulled from the manufacturers server, with one which pulls photos from the NASA website. Fortunately they left ADB enabled with root permissions, so it was trivial to replace their startup app with my own. All the source code is public here: https://gitlab.com/prbs23/mars-photo-stream