A lack of infrastructure is an issue for Australia, but there are plenty of other concerns.
Ultimately, services like Stadia need to prove that the many potential headaches associated with them – at least early on – are actually outweighed by the advantages.
Stadia and other streaming services really do feel like they raise more questions than they answer, so for now, perhaps its not such a bad thing that Australia isnt part of the initial rollout. This vision of the future of gaming seems like its going to feel pretty inessential for some time to come. Mind you, itd still be nice to have the internet to support it.
Source: N4G PC Google Stadia, Australia and the Impending Game-Streaming War