Check out the pics at the link, a really interesting concept.
Once the implantation process is complete, changing your tattoo is easy and quick with the moodInq Wand. Just fire up the tattoo design software and choose your design from our database of over 100,000 tattoo designs. Resize, flip and crop your images, add text, or even upload your own designs. Plug in the wand to your computer via USB and simply run the wand over the canvas to configure the E Ink capsules in the canvas to display your chosen design. The design will remain exactly the same until the next time you use the wand or in the rare case of a large electric shock or massive EMF disruption.
The uses of a moodInq tattoo are endless. Going home to visit Mom & Dad? Run the wand over your lower back and remove that "tramp stamp" your parents forbid you to get. Need to impress a hot date? Prove you're a man with family values when you show up with your MOM tattoo. Need a green way to keep a grocery list or note to self? Tattoo it on your arm! Are you good enough, smart enough, and gosh-darn-it-people-like-you? Tattoo your favorite affirmations and get through those rough days with ease. The moodInq lets you change your tattoo to suit your mood!
"BFD"
Joke or not, tatoos are just disgusting.