Most “TV’s” have slide show capability. One only needs to plug a USB stick into the display, select the picture or video mode and image sequences can be displayed.
However this mode may not be particularly flexible. e.g. they probably will not have a mode to allow presenting images at one very 60 minutes. Better apps for displaying images as I suggest are needed.
Media boxes may add more versatility.
My experience has been even media boxes are inadequate as they are targeted at the video streaming market. In the future I will try a “build-your-own” Raspberry media box.