Ubuntu for Android is a full-featured operating system for desktop computing and all you would have to do is dock your phone to use it. In addition to a desktop operating system, all of the functionality from the phone would be available to you at the click of a mouse. If your phone gets a call or text message, it would pop up on the external monitor you’ve set up to use (via Ubuntu for Android Could Erase the Need for a Desktop Computer)

The complete portable desktop.