Hello Linux Geeksters. Canonical has announced that Ubuntu 14.04 Trusty Tahr, which is still under massive development will switch to Kernel 3.13 RC 1, after they perform a few more tests.

This is what Joseph Salisbury, one of the Canonical developers, said in the official mailing lists:
The master branch is currently tracking the latest 3.12.1 upstream stable kernel while the unstable branch has most recently been rebased to v3.13-rc1. We shall move our master branch to track v3.13 after some baking. We will also upload to the archive when it’s ready,
Because Ubuntu 14.04 Trusty Tahr will be a LTS (long term supporter) version, it will not come with bleeding edge features. Gnome 3.8 will still be the default desktop environment for the Ubuntu 14.04 Gnome, while Mir will not be implemented as a replacement for the X.org server, due to some XMir performance issues.
For those who don’t know, Ubuntu 14.04 Trusty Tahr will be officially released on the 17th of April 2014, along with a stable version of Ubuntu Touch, based on Ubuntu 14.04.