It's called a laptop, isn't it?
I guess there are a few options. If you wanted to serve content straight from your PC you could use a media extender of some description (uses your network, so wireless or CAT5 cable), but I guess that would be the most expensive option. It is the most flexible though.
I guess what you're after is something like
this. I've no experience of such a device, and it's a niche-enough of a product that I doubt you'll not find a major manufacturer, so you'll have to rely on user reviews I guess. I'll not look for an Aussie version, as you may have completely different options, but that seems to do everything you'd want in the UK. A simple search for "USB" and "HDMI" brought up that sort of device.