One could argue that it takes latte art up five levels.
In this video by rnzohar, the concept of putting drinkable images on the foam of your latte or cappuccino goes well beyond flowers and seashells. While not the first mechanical “java printer” it is definitely the most detailed that we’ve seen.
For non-coffee-drinkers, it also works on the head of pint of beer. For non-beer-, non-coffee-drinkers, perhaps a bubble bath would do.
Either way, the creator has a dilemma:
I can not figure out a reasonable way to turn into anything except for a temporary curiosity.
Here is one of the predecessors that hit the Internet a couple of years ago. It’s like comparing a Macbook Pro to an Apple 2C, and just like the Apple 2C, this printer was awesome in its time.