MeeGo is in future, work-in-progress, no apps and hardware support is incomplete. This means n900 implementation is not practical for every-day use, questions over Nokia implemenation (e.g. how much will be closed-source) Let's suppose that people start writing open-source versions of the stuff in maemo and is ready for everyday use. Let's suppose when Meego is "formally" released we discover some apps are closed-source.