While i think the direction that Ubuntu is going is wrong as a desktop user the mobile market is still a high possibility of where Ubuntu might finally shine and grow.
I mean if the ubuntu edge device is a success it might mean that the age of mobile computing is viable.
What canonical is doing is interesting creating a device to bridge the gap between traditional computers, tablets and smart phones.
This device is in the end more then just a phone, its the gateway to a brand new world that can shale all of Ubuntus competitors to the ground.
But if its a dud well I think Ubuntu should just go back to desktops asap and leave this mobile business behind them.
In fact there is a part of me that wants that to happen admittedly, as the desktop market is still here and wont go away anytime soon.