Under the hood, there have been updates to many core packages, including a new 4.8-based kernel, a switch to gcc-6, and much more.
Ubuntu Desktop has seen incremental improvements, with newer versions of GTK and Qt, updates to major packages like Firefox and LibreOffice, and stability improvements to Unity.
Ubuntu Server 16.10 includes the Newton release of OpenStack, alongside deployment and management tools that save devops teams time when deploying distributed applications -- whether on private clouds, public clouds, x86, ARM, or POWER servers, z System mainframes, or on developer laptops. Several key server technologies, from MAAS to juju, have been updated to new upstream versions with a variety of new features.
Download ubuntu 16.10
You can download ISOs and flashable images from from:
http://releases.ubuntu.com/16.10/ (Ubuntu Desktop and Server)
http://cdimage.ubuntu.com/ubuntu/releases/16.10/ (Less Popular Ubuntu Images)
http://cloud-images.ubuntu.com/releases/16.10/ (Ubuntu Cloud Server)
http://cdimage.ubuntu.com/netboot/16.10/ (Ubuntu Netboot)
http://cdimage.ubuntu.com/ubuntustudio/releases/16.10/ (Ubuntu Studio)
http://cdimage.ubuntu.com/ubuntu-gnome/releases/16.10/ (Ubuntu GNOME)
http://cdimage.ubuntu.com/ubuntukylin/releases/16.10/ (Ubuntu Kylin)
http://cdimage.ubuntu.com/ubuntu-mate/releases/16.10/ (Ubuntu MATE)