Hello,
I know this is a bit long shot, but there it is: Lets say I have KDE and entire linux desktop installed on my Android phone in chroot or tailored somehow into Android filesystem. When phone is in phone mode (no extra devices connected), entire desktop is stopped, nothing interesting is happening. But when keyboard, mouse and large display is connected (desktop mode), desktop is started and phone acts also as any other PC. Phone itself still works as usual. There are many other issues to solve before this is easy to do, but it is possible, and one major issue is very related to Akonadi.

When running on Android phone, there is no way to use local Android accounts as Akonadi resources. This does not include any network communication from Akonadi or resource. Point is to make contacts, calendars and other personal data stored in the phone accessible to desktop applications whithout duplicate syncing over remote server. Any change in desktop apps will be instantly visible in phone apps, since they are using the same database and running on one computer.

To better understand what I'm talking about, take a look at http://www.youtube.com/watch?v=iv1Z7bf4jXY -- however this is not specific to Ubuntu in any way, plain KDE on Debian is much more likely scenario.

Installing desktop on phone is already possible, but integration with phone features is the hard part and this Akonadi resource is important prerequisite.

Thank you for your time.

Reproducible: Didn't try