Wasn’t it more expensive to buy it from Amazon US?

You do realise that the supply chains are already there, it's not like all theses goods are new to the market , about your comment about an Island country with countless middle of nowhere locations  Australia is one of the most urbanised countries in the world with around 85% of the population living in the capital cities and shipping goods from china and other manufacturing centres is a  similar distance wise to places like the US.plus some stuff like blu-ray games are  manufactured locally.

It's very much price dependent , take my PSVR bundle together with a charger bundle and taking into consideration shipping and exchange rates it turned out to be S100 cheaper to order from the US store, the only negative being the shipping time of around  4 weeks, now this was a black Friday deal  and I would not have made sense to me otherwise,so like i stated at the beginning it depends on the items pricing comparison to the Australian price of the same goods taking into consideration, extra costs and how quickly you need that item.

Amazon won’t change much - Australian pay higher prices for everything. I don’t expect any new game to be cheaper on Amazon.

Very nice! If this is the standard price, then it should be the cheapest one out of the other main retailers.

The only good thing about buying it at EbGames, is you could get some good trade value of old games and consoles (if you dont want to sell it online). 

My reply to you was to show that the impediments to online shopping in Australia are no different to anywhere else, reading your message makes it sound like they are trail blazing Australian online, Amazon will like you said  have an impact just by their size and brand recognition, it just won't be the impact that it would have been if they had come to the market earlier Australian online retailing is a lot more competitive now with local players like Kogan filling the void and  growing at  a fast pace.