From the conversations I had with the creator of Toga at PyCon AU 2014 and before its release, this is understood, and the current dev was towards 'it works on ubuntu', and more will come. The system is extensible so down the track the issue will be more "which do i pick" not "i can't find a way to render" ... since nothing stops this using some kind of text mode terminal UI rendering library, or a raw frame buffer one, its very awesome.