There's nothing that says an iTunes rewrite would necessitate opening X programs to sync content. It's trivial to envision an architecture where a sync service is aware of and can pull from those X repositories.
In fact, iTunes already works like that with regards to contact sync'ing (from Mail) and the optional iPhoto/Aperture photo sync'ing.
And the only time someone need open those individual apps is when they want to consume or manage that content.
In fact, iTunes already works like that with regards to contact sync'ing (from Mail) and the optional iPhoto/Aperture photo sync'ing.
And the only time someone need open those individual apps is when they want to consume or manage that content.