Have heard through reputable sources that CASA is looking at further miniturisation of the ADS-B units to microchip size. All pilots who obtain new licences will be required to cough up $3000. A small fraction will be allocated to licence issue with the remainder going towards a microchip implant operation to insert the chip behind the pilot's left ear hole. All pilots will then have an ADS-B unit.
Additional benefits include the option of allowing AOPA a small transmission to generate a slight hum in the ear when subscriptions need to be renewed and a noise cancelling option that deletes any mindless spiel emanating from Dick Smith from reaching the pilot's brain.