To mark this occasion - and to perhaps remind people that Miitomo exists - Nintendo has published two video promos which highlight the new features. Direct messaging is the most prominent of these, which is understandable as it transforms the app into a stronger social networking tool than it was previously.
As well as these videos, there's a Japanese promo which also focuses on Miitomo's new talents.
How are you getting on with the updated app? Have these fresh elements convinced you to start using it again, or did you never stop? Let us know with a "direct message" of your own in the comments section below.