The Reserve Bank did recently a study on how Australia pays. Here is the result
There are some points here that are clear, cash is still there, but it dropping eventually I am sure like the dinosaur it will go.
Surprisingly its only been a few years but card payments are rapidly moving to contactless and its now by far the most popular payment method.
Cheques are now almost gone; I know most of my clients only very reluctantly are accepting them at the moment. I read that officially cheques will be phased out starting 31st October 2018.
I still think that the credit card will soon be replaced by the mobile but this clearly is in the future.