We have discovered a while ago that the Samsung Galaxy S4 is also dubbed the Project J Altius. However, it appears that the Project J is actually consisted of three different devices, the Samsung Galaxy S4 Mini (Serrano), a smartwatch (Fortius) and of course, the full-fledged Samsung Galaxy S4 (Altius). The Samsung Galaxy S3 already has a Mini version and it makes sense for the S4 to also have a sidekick.
This is the first time we hear about the Fortius and Serrano. So, very little details are revealed about them. The smartwatch could be a companion device for both the Galaxy S4 and Galaxy S4 Mini. It is sensible to expect that the watch will be able to show text messages and notifications from the phone. Users will no longer need to pull out the phone only to perform trivial tasks.