Ps4 – use a PS4 Playstation Move controller on a PS3

There will be fewer games that support Move at the moment because it's a relatively new device. If you look today you might not find the games you want on the PS3, but as time passes more games will be released that make use of Move.

Digital Trends has an article that compares the Move to a Wiimote. The basic difference is:

While the accelerometers inside the controller act much as a Wii does, the balls provide what Sony calls a zero point – an absolute location in physical space for the system to peg all the other data to.

While the Wiimote uses its camera to locate the IR emitters in the sensor bar placed above or below the screen, the PS3 uses a camera to locate the glowing ball on the Move. I've never used the Move so I can't tell you whether it's better or worse than the Wii.

The games should not be region-locked. The only problem he might encounter is the region-based support. When contacting support, you are prompted asking for a serial number, which tells which support center you are connected to.

Other then that he should not encounter any problems. As long as the Australians don't have any special rules. I also know some games are probably more expensive in Australia so he`ll probably benefit from setting up and EU or US SCE account too.