In order to recreate those small but valuable moments that come from unexpectedly stumbling across something forgotten but precious, they design Photo Box, an example to use simplicity in material in combination with complexity of form.
In addition to printing the photos, Photo Box aims to make old time moments in presence in a random and unexpected way, though the pictures that can recall your memories on your flicker account.
It picks one at random and prints the photo out internally using the small photo printer contained in the lid. The box is designed as "slow" that you can't decide either when nor what it will print out, all you can do is give it a shot.
The case implies that not only the affordance of being able to archive is of relevance, but also the aesthetics of its design, its emotional value of the environment, etc. It brings a kind of passively mental rest to our everyday life, like a mailbox of memories receiving mails from past self.
Modern people have no time to actively recall the old memories from the vast digital archives that we are built throughout our lives, because we are busy to built them with modern, fast and convenient technology. Here, the Photo Box apply aesthetics, the aesthetics of presence, inner design logic, use, basic technology, reflective content, etc, making people conscious of use of technology. It's a device that claims time; using such an object should not be time consuming but time productive.
You can take it as "functionality versus aesthetics". The difference in aesthetic between the two printers is a difference in philosophy of design; the "slow" photo printer is not designed to be "just" an efficient printing mechanism for non-reflective use, but rather an artifact that through its expression and slow appearance puts reflective "use" in focus. Honestly, Little Printer is a very useful and convenient device for people who are forgettable and careless, but with fast technology we aim to take away time, with slow technology we live with time.