Hello Linux Geeksters. Ubuntu Touch has been succesfully installed on Sony Xperia Tablet Z, according to this post from the XDA developers forum.
The porting of Ubuntu Touch on the Xperia Tablet is still experimental, but the main features work properly (including Wifi and Camera), except for the video recording. It boots via CyanogenMod, allowing the users to easily switch between Android and Linux.
However this is an important thing, maybe some third party developers will decide to work and adapt the Ubuntu mobile operating system for different devices.