Possible Changes In Ubuntu 13.10 Saucy Salamander [UDS]

Ubuntu Developer Summit is a meeting where software developers gather to discuss the next Ubuntu version changes and features.
The Ubuntu Developer Summit (uds-1305) will start tomorrow, will last for 3 days and some major possible changes will be discussed, like "click packages", Chromium replacing Firefox as the default web browser, Unity 8 with Mir being available for testing on the desktop and more.
So here are the possible changes in Ubuntu 13.10 Saucy Salamander desktop as well as Lubuntu and Xubuntu 13.10.