It appears that not only the Nexus tablets have received the Ubuntu Touch treatment, but also a model like the Sony Xperia Tablet Z shown below. A post on the XDA Developers forum confirms that the slate is now running the platform, albeit in experimental phase.
This is a working version with a few minor bugs and apparently a backup is advised at this point. The Ubuntu Touch port allows the Sony Xperia Tablet Z to dual boot into Android and CyanogenMod. The version tested at XDA Developers was the WiFi one, in case you’re wondering. Ubuntu Touch is able to place a phone and a tablet app on the same screen at the same time, for some kickass multitasking.
The concept is vaguely similar to the multitasking by snapping apps together on Windows 8. Ubuntu Touch also comes with a method of navigation that involves all the 4 edges of the screen. They’re used to navigate between apps, settings and controls and there are no buttons on the Ubuntu tablet, that’s the concept.
The video below should give you an idea on how well the Xperia Tablet Z is handling the OS.