You're really complicating that description, Chip.

Mac: A Roku is like a cable box, except instead of hooking up to the TV line you hook it up to your internet (it's even wireless so you can put it anywhere in the house).  And then you can just pick the channels you want, so there's nothing there you don't want.  I've got about 20 channels, I watch about five (Netflix, Vimeo, Rev3, and Crackle) and almost everything there is in HD.  You can even hook up a USB stick to it to put your (mp4 and mkv) videos and pictures onto your TV.