This doesn't impact the merchant acquiring business as crypto...

This doesn't impact the merchant acquiring business as crypto would simply be another 'currency' used in payment and this can be accommodated by Tyro by the flip of a switch.
The RBA are referring to a CBDC or something close to it ie. some form of stablecoin, to facilitate issuing and acquiring banks from being able to efficiently clear these transactions. This is where the barriers are at the moment for widescale adoption. The RBA are effectively endorsing some form of collective (monopolistic) industry action to expedite the change.