The main sources of Internet TV in Australia.
Free to air
These are channels on your television offering online (and free) streaming services to your device. These include services like ABC iView and SBS On Demand.
Pay per view
These are companies who have developed their own streaming system and charge you per item that you'd like to stream including TV shows, movies and music.
These are providers that charge you on a monthly basis for certain privileges on their service. You get access to a range of premium TV shows and movies and there are different package options you can opt for. Be mindful that in most cases you'll need an internet connection or a reliable ISP (see below) to stream the content. Some notable players in the space are Foxtel, Netflix Australia, Presto, Quickflix and Stan.
Internet Service Providers (ISPs)
Internet service providers can offer their own streaming services too. Offering both movies and TV shows, players like BigPond TV, Telstra and Optus all offer their users the option to download these for a price per content.
Even consoles are jumping on board Internet TV. Payers like Sony, Play Stations are offering Freeview shows, plus pay per view content.
Typically these are providers who are based in the US. There's been a lot of debate regarding how cheap internet TV and the range of content available compared to the US and Australia.