Ozbusdriver, this is what I said:
Most importantly, the RFDS has TCAS, and at the present time if we fit more aircraft with Mode C transponders, the RFDS will get proven traffic information from aircraft so fitted.
(My underlining)
Ozbusdriver, you seem to think that if traffic information is given between aircraft using TCAS, it is somehow inferior to an air traffic controller looking at traffic information on a screen and then passing it on to the pilots concerned. I believe both systems provide a traffic information service, and the advantage with TCAS is that it is more automated and works outside coverage by air traffic control radar or air traffic control ADS-B.
I say again – at the present time, nowhere in the world is there an ADS-B operated aircraft to aircraft traffic information device which has an audio call out.This means the pilot would have to look down at the ADSB screen all the time instead of keeping a good lookout.