And the Socceroos squad has welcomed Postecoglou's demand that they attend an A-League match.
The entire Australian squad will attend Saturday night's Round 6 match between Western Sydney Wanderers and Melbourne Victory in Sydney.
It's a far cry from March, when Socceroos players were banned by then-coach Holger Osieck from attending an A-League match ahead of a Tuesday night World Cup qualifier.
But Postecoglou wants the Socceroos to experience the burgeoning A-League atmosphere as part of his plan to grow the code in Australia.
"It's refreshing," Socceroos stalwart Tim Cahill told reporters on Saturday.
"Tonight we're going to an A-League game to watch Western Sydney Wanderers, he (Postecoglou) wants to share the experience that us European players haven't got to see.
"It's going to be a good moment for all us. It's a lot of change going on, but for the positive."
Socceroos attacker Dario Vidosic, who joined Swiss club FC Sion from Adelaide United, also welcomed the move.
"It's starting to come to where it belongs, football in this country," Vidosic told reporters on Saturday.
"Tonight we'll be going to ... to see the atmosphere.
"I was lucky enough to be a part of the A-League and it has grown even more now.
"Tonight it's a sell-out. It's going to be unbelievable for the Australian game, how great it has been this season."