Perhaps this will open the door for ubuntu touch to be ported over to the Lumia. ? see guide. >> http://allaboutwindowsphone.com/features/item/24245_Aguideforunlockingthebootloade.php
It is a first step I guess. But there's still a long way to go before such a thing is even worth thinking about.
The article does not intimate that there is even any other OS to be installed on the device after the bootloader is unlocked. No alternative OS means no work done on drivers, means nothing to talk to the hardware for Ubuntu Touch to use.