Hello Linux Geeksters. As you may know, Canonical has been working a lot lately at Ubuntu Desktop, Ubuntu Touch, Unity 7, Unity 8 and Mir display server.
From Ubuntu 13.10 to Ubuntu 14.10, the Ubuntu developers have kept Unity 7 as their default DE, while Unity 8 running on Mir has been implemented only on Ubuntu Touch.
Recently, Canonical has started backporting the Unity 7 version used on Ubuntu 14.10 to Ubuntu 14.04 LTS, bringing a bunch of fixes and enhancements to Ubuntu Trusty.
Among others, the lockscreen password between screens is now preserved and the arrow activator has been implemented to the lockscreen, support for getting the distribution’s name from /etc/os-release has been added, the Launcher icon count badge width has been enhanced and the exposed open windows are displayed in the preserved order.
In order to get all this Unity changes on Ubuntu 14.04, just perform a regular system upgrade:
$ sudo apt-get update
$ sudo apt-get dist-upgrade