When we redecorated our kitchen shortly after moving in some 14 years ago we had the foresight to paint one of the walls in our breakfast nook with a base layer of magnetic paint before covering it with wallpaper. Each year we use magnets to affix holiday cards from our friends and family where they remain for the entire year.  In the sea of cards is a 4K television which serves as a display and picture frame for my photography.  Each slide show contains 1000 images which change every 20 seconds.