There must be drivers for Android 4.4.2 because there is a Kitkat port of Cyanogen Mod running on the FP1. So there is everything one needs, if one has the ability to port Ubuntu.
@ben:
It seems very orderly, but it feels like the first Windows Mobile devices from the early 2000s must have felt. There is NO eye candy. NOTHING. Does it even have a wallpaper option? From what Jono Bacon shows, Ubuntu phone looks REALLY boring!