Yes, the "Fortress NZ" strategy has that implication - elimination, but while herd immunity slowly builds up around the world in a hopefully controlled manner (which is the only path) NZ will be virus free, but with a massive ongoing economic hit and split families etc.
will be interesting to see if NZ regrets their approach once the true infection fatality rates become clear and widely known from serology studies. The more lethal the virus the more their approach makes sense, its easy to get everyone on board when they think they have a 1-3% chance of dying if infected, but 0.3%, may be some dissenters when their dollar drops. Shuttering tourism completely would put them basically in a long term recession on its own no? If there is a delay in the vaccine what is NZ's plan B?
In the medium term there has to be a way for them to safely allow some tourists to return, perhaps an antibody card or something.