The second point release of Ubuntu 14.04 LTS Trusty Tahr is available for download. OMG Ubuntu has all the details of what's in Ubuntu 14.04.2 LTS.
Sam Tran reports for OMG Ubuntu:
As a Long Term Support release, Ubuntu 14.04.2 includes an updated hardware enablement stack that includes the 3.16 Linux kernel and an updated version of the Xorg display server. The 3.16 kernel, released back in August and included in Ubuntu 14.10, comes with a raft of features including new Kepler GPU support, many fixes to Btrfs, and – for the gamers with PS4s – support for DualShock 4 controllers.
The new hardware enablement stack will be installed by default if you install from 14.04.2 installation media, but if you’re humming along nicely with the current versions of Xorg and the Linux kernel on 14.04 and 14.04.1, fear not – the new stack is not installed by default and is completely opt-in.