@Linebreak
Well mass migration to Australia from Italy stopped at around 1970, so obviously most of the kids/grandkids etc have assimilated (to a degree) to the Australian way of life.
There is still plenty of Italians around Sydney though. Inner Western suburbs like Haberfield, Concord, Five Dock, Leichhardt (also a few around Drummoyne and Ryde) and a lot in south western suburbs like Bossley Park, Wetherill Park, Prairiewood etc.
Give it another 20 years or so and most "Italians" will be fully integrated as Aussies as there isn't any more migration here from the old country and the great grandkids of these migrants will obviously not know the language, get married to different ethnicities etc.