Ah, I see. So you would subscribe to these channels and then have access to them? See over here it's not really done that way. Our main digital channels come through Sky, the largest digital service, and via their Sky box through the TV, though you can also hook up via the Internet. It's probably just me, but I've never had any experience at all with subscribing to internet TV channels, which is why I was asking about Netflix: it's something totally new to me.
Thanks for the info though Jansz: clears it up a bit now. For a moment I thought this Roku thing came with tiny people inside who acted out episodes of your favourite shows on demand...