14 DAY TRIAL // Canonical has decided that, at least for now, it will try to implement Linux kernel 3.13 into Ubuntu 14.04 LTS (Trusty Tahr).
Choosing the Linux kernel for an LTS release is a very important step for Canonical because it will have to support that kernel for a period of five years, even if the kernel maintainers decide to make it EOL (end of life) a year from now.
Canonical's Linux kernel team decided during the Ubuntu Developer Summit (UDS) to shoot for the 3.13 version of the kernel.
There are some problems that might arise from this choice because a lot of vendors and hardware manufacturers have announced their intention to have a lot of commits for that particular cycle. This means that 3.13 might end up being a very large kernel, with a lot of new and potentially unstable things added at the last minute.
The developers have also acknowledged the fact that they might be able to even get the 3.14 kernel in Ubuntu 14.04 LTS, if it is released early enough for Canonical to do some proper testing.