Is there an official decision that e.g. Netbook, Handset and IVI will have MeeGoTouch as a common UI framework?

I'm just interested in because the following diagram doesn't say anything about MeeGoTouch.



So I'm wondering that if one writes an application for MeeGo handset is it guaranteed to work on MeeGo IVI or MeeGo Netbook?

Btw, I know that this is not the topic of the thread so sorry about going to side tracks. In my opinion to get backward compatibility for Maemo5, the common nominator is Qt.