Here's my custom Raspberry Pi 3 digital card display. It cycles through images of my favorite trading cards like Pokemon, Magic the Gathering, Yugioh, baseball, hockey, football, etc. It's an alternative if you don't want to use one of those digital photo frames. With this 5 inch LCD, the displayed cards are almost the same size as the real life cards.
Check out my youtube video for a more thorough tutorial:
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Step 1: Parts
Step 2: Raspbian OS
This custom build of Raspbian has the drivers for the display already setup. Use etcher to burn it to a 8GB or more microSD card.
Raspbian Image with Waveshare setup
Waveshare 5 in LCD manual
Step 3: Download Images
High quality card images can be found on Google images or from pkmncards.com.
Step 4: Feh Image Viewer
Install feh image viewer
sudo apt-get install feh
sudo apt-get install unclutter
sudo apt-get install xscreensaver
feh command DISPLAY=:0.0 XAUTHORITY=/home/pi/.Xauthority /usr/bin/feh --quiet --preload --randomize --full-screen --scale-down --auto-zoom --reload 360 -Y --slideshow-delay 60.0 ~/cards/pokemon/
Autoboot card display
sudo nano /home/pi/.config/lxsession/LXDE-pi/autostart
Step 5: Bezel
I created a 3D printed bezel. I printed the label with a color laser. This is completely unnecessary but I wanted to make the display look like a PSA graded card.
3D printed PSA bezel
Step 6: Complete
If you found these steps too complicated, a tablet/smartphone or even digital picture frame will accomplish something similar.