Rule reminder
Dislocation can be combined with emphatic elements for strong expressive effect. 'Il libro, l'ho letto PERSINO io' (I even read the book — stressing the unexpected reader). Emphatic particles like 'persino', 'addirittura', 'pure', 'anche', 'proprio' combine with dislocation to create highly marked, expressive structures in spoken Italian.
In 'Quella notizia, l'ha sentita anche il nonno!', what is the emphatic effect?