If you've been thinking about ways to stream Steam games to your living room and don't want to go through the hassle of building a second PC or can't be arsed wiring up your existing rig or laptop to the TV, here's a decent alternative.
It works best with a wired connection, and it's not a bad idea to use one of the USB ports for a mouse in case things crash. But given that Steam has got native support for PS4 controllers and that there are 2.2 million Steam accounts in Australia, there's a good chance a few people might be interested in getting a Steam Link shipped to your door for $41.
Given that you can't buy directly through Steam anyway, this is about as good as you can get on Valve's streaming device. It'll take roughly a fortnight with the cheapest possible shipping, which would still give you enough time to get it installed, updated and working for Christmas.
If you're interested, you can also pick up a Steam Controller on the cheap. The PS4 controller is probably a better bet at this point though, especially now that developers can access the touchpad and gyro features.