Hello Linux Geeksters. As you may know, the first release candidate of Linux Mint 17 Qiana has been made available today, in both Cinnamon and Mate flavors. Also, new information about the future Linux Mint releases has been made available today. According to this announcement, the next Linux Mint systems will be using only the LTS versions of Ubuntu as code bases.
While Linux Mint 17 Qiana is based on Ubuntu 14.04 Trusty Tahr and supported until 2019, the next systems will be Linux Mint 17.1, Linux Mint 17.2, Linux Mint 17.3, all based on the same Ubuntu 14.04, only Linux Mint 18 being based on a different system, Ubuntu 16.04.
With this changes, it will be easier for the users to upgrade to the next versions, if the two systems are using the same Ubuntu code base. Also, this will allow the developers to focus on the development of Cinnamon, Mate and other Linux Mint tools.
Linux Mint 17 Qiana will be supported until 2019, but will get new features implemented only until 2016.