All four artists have their musical sensibilities rooted in the long-ago and the people who have influenced them are mostly long-gone dead so it seems a bit disingenuous to call the documentary The New Sound of Country.
Perhaps it should have been called The Sound of Country That has Been Around For a While and People are Finally Starting to Notice.
It's about authenticity really and all four of these artists' appeal is about the unfeigned way they express themselves.
Delaney Davidson explained it well when he said "It's about a yearning for home - creating that feeling of longing."
Marlon Williams said he likes "twisting country music on it's head and painting it different colours."
Having the extraordinary musical talent to do so without sounding ridiculous explains why he is a winner of so many music awards.
I remember him as a cool and quirky kid who attended Lyttelton Main School with my daughter in the early 2000s.
It was easy to see then that he would never be ordinary and his voice is extraordinarily beautiful.
Barry Saunders I remember from 1980s Wellington when his band, The Warratahs, held a Friday night residency at the ugliest pub in town, the Cricketers Arms.
His talent has not diminished in 30 years and he seemed right at home on stage with the younger artists, occupying the same enclave.
Canadian import Tami Neilson is a wonderful gift to New Zealand and we should all thank the Kiwi bloke who married her and brought her home.
Her songs are genuinely heart-rending and her new composition Lonely, partly written by her recently dead father is breathtaking.
The February 2011 earthquake had a profound effect on all four musicians - Davidson, Williams and Saunders were all in London St, Lyttelton when the big one hit.
They would witness the destruction of the historic Harbourlight Theatre where Neilson was scheduled to play the following night.
The documentary ended with the four of them singing unaccompanied in Christchurch's cardboard cathedral.
I hope they are planning another church tour and will include Whanganui in the schedule - St Peter's in Gonville would be a fine venue.