These release notes for Kubuntu 16.10 (Yakkety Yak) provide an overview of the release and document the known issues with Kubuntu 16.10.
Kubuntu 16.10 will be supported for 9 months.
Designed to be a Breeze, Plasma 5 is now even further improved
Plasma 5, the next generation of KDE's desktop has been refined to make it smoother to use while retaining the familiar setup.
The 7th set of updates to Plasma 5 (latest and final bugfix release from September) is the default in this version of Kubuntu.
Combined with KDE Frameworks 5.26.0 the Plasma 5.7 desktop brings improved workflows, rewritten and improved task manager and system tray, another milestone step towards Wayland support, and improved Breeze icons and Plasma theme.
KDE Applications 16.04.3
Kubuntu comes with KDE Applications 16.04.3 containing all your favourite apps from KDE, including Dolphin.
Even more applications have been ported to KDE Frameworks 5, but those which aren't should fit in seamlessly.
Getting Kubuntu 16.10
Upgrading from 16.04
Download a Disk Image
(1633692) upgrade from 16.04 to 16.10 may require a user to manually install the package ubuntu-release-upgrader-qt prior to running the upgrade
(1514491) kubuntu desktop inconsistency and integration issues: scrollbars. gtk3 button placement also not integrated
(1530523) kcm_driver_manager: Infinitely shows Collecting information
(1561051) Ubiquity-DM dies on Kubuntu images
Please also take note of the Ubuntu Release Notes, that might contain additional information.