In a sense these projects prove the obvious yet hidden-in-plain-sight: the vast numbers of mobile computing devices that have circulated since the "iPhone moment" could be reconfigured in all sort of ways to be more than a dumb touch screen client for scrolling down social media pages.
If we ever get to see a true open mobile OS there might be a Cambrian explosion of new applications and use cases. Not holding my breath though. The failure of open source mobile to reach a workable stage is now pretty clear. It seems this domain is TITO (too important to open).