Think you will find that auto gates for visa exempt will only be made available when the proposed ETA is introduced and up and running..
When that is introduced is anyone's guess.
Edit: ..From Mr Google....
"The ETA will allow a single entry and be valid for up to 60 days. Visitors can extend their stay by 30 days if needed. Those with an ETA can use automated immigration gates at checkpoints. By scanning the QR code on their ETA, travellers will be able to clear immigration more quickly."