That's true... I didn't think about a video capture device or TV tuner (w/composite, of course). You would want a USB 2.0 of Firewire device, and make sure there there is no encoding delay. Otherwise, there could be a 2-5 second delay before output appears on your Macbook. I have a USB 1.x TV tuner and there is a several second delay before I get video. Flipping through channels sucks and it's completely useless for video games.