I somewhat share the worry. However, it has to be said that Maemo and Moblin have come quite a long way already, the experience (and software) surely won't simply be discarded. Problems solved during the Maemo development cycle (hardware drivers, memory optimization, internal services, UI etc) will not need to be solved again from scratch. The basic OS will probably require very few changes (even though it will require repackaging).

If Nokia can deliver a top-class Harmattan device this year, nobody will care about previous strategy, roadmaps and "step X of Y".