If this achieves widespread in the US I could see regional libertarian and green candidates picking up spots in certain areas in US.
This seems like an odd choice, given that Australia currently has five different parties in Parliament, and has in recent history had a third party be the deciding "vote" on who forms government. It seems like an even odder choice for you to reference it as a counterpoint in this specific case given that one of those parties is literally called "the Greens".