Turnbull is still saying the NBN has a competitive advantage over mobile.
I have no doubt some will go to 5G as their main access, but households with more that 1 or 2 people would be more inclined to have fixed line at home.
10,000Mbps fibre connections are beginning to be offered overseas, which is a sign of what is coming.
5G and fixed line with both have their place, they are not mutually exclusive of each other.