Hello Linux Geeksters. It looks like Ubuntu 14.04 Trusty Tahr will be powered by Kernel 3.13. Since Ubuntu 14.04 will be a LTS (long term supported) release, the chosen Kernel will be maintained and updated by Canonical for five years, even if it reaches EOL (end of life) after one year.
Since many hardware manufacturers have announced that they plan to integrate many new things to Kernel 3.13, it may provide an unstable system, which is not good at al for a LTS release.
Canonical can skip Kernel 3.13 and choose Kernel 3.14 for the stable version of Ubuntu 14.04, if it gets released early enough.
Among others changes that will be implemented in Ubuntu 14.04, the Ubuntu developers aim to upgrade Qt 5.0 to Qt 5.1, after they manage to fix the Unity 8 Shell crashes and the bugs occurred when running the Ubuntu Weather and Calculator apps, part of the Ubuntu Touch Core Apps.
While Ubuntu Touch already uses Qt on Mir, Canonical has to make Qt Mir-compatible on the desktop version of Ubuntu also.
As a reminder, Canonical has been working a lot at Mir, their own display server, which is intended to be an alternative to the good old X.org server. While it is implemented by default on Ubuntu Touch, Mir will land in the desktop versions of Ubuntu, starting with Ubuntu 14.10.
For now, Ubuntu Touch is officially supported only on the Google Nexus smartphones and tablets, despite the fact that it has been experimenally ported on OPPO Find 5, Pantech Vega Iron, Xperia Tablet Z and many other phones/tablets. The first stable version of Ubuntu Touch, based on Ubuntu 13.10, has been officially optimized to work on LG Nexus 4, but it is not mature enough to compete with Android yet. After the latest Mir update, Ubuntu Touch can be successfully installed on all the existing Google Nexus devices: LG Nexus 4, Samsung Galaxy Nexus, Nexus 7 and Nexus 10, except Nexus 5.