A few days ago The RPi Foundation upload a new version of the official OS Raspbian and the OS installer NOOBS. If you want to know what's new on this release, you can read the full post.
For those who are looking forward to change repos from Wheezy to Jessie, we will have to wait a little longer.
Switch to Java 8 from Java 7
Minecraft Pi pre-installed
Sonic Pi upgraded to 2.0
If you want to upgrade your actual Raspbian distro:
sudo apt-get update && sudo apt-get dist-upgrade -y