Here’s the start of the release announcement:
Codenamed “Trusty Tahr”, 14.04 LTS continues Ubuntu’s proud tradition of integrating the latest and greatest open source technologies into a high-quality, easy-to-use Linux distribution. The team has been hard at work through this cycle, introducing new features and fixing bugs.
Ubuntu 14.04 LTS is the first long-term support release with support for the new “arm64” architecture for 64-bit ARM systems, as well as the “ppc64el” architecture for little-endian 64-bit POWER systems. This release also includes several subtle but welcome improvements to Unity, AppArmor, and a host of other great software.
Ubuntu Server 14.04 LTS includes the Icehouse release of OpenStack, alongside deployment and management tools that save devops teams time when deploying distributed applications - whether on private clouds, public clouds, x86 or ARM servers, or on developer laptops. Several key server technologies, from MAAS to Ceph, have been updated to new upstream versions with a variety of new features.
The newest Kubuntu, Edubuntu, Xubuntu, Lubuntu, Ubuntu GNOME, Ubuntu Kylin, and Ubuntu Studio are also being released today. More details can be found for these at their individual release notes:
Maintenance updates will be provided for 5 years for Ubuntu Desktop, Ubuntu Server, Ubuntu Cloud, Ubuntu Core, Ubuntu Kylin, Edubuntu, and Kubuntu. All the remaining flavours will be supported for 3 years.