Productivity++
I just discovered that my TV has a split screen mode. I can watch TV and do something on the Xbox at the same time! This is great because I wanted to queue up a bunch of downloads, but I also wanted to watch recorded MythBusters. Thus I saved myself 5 minutes by doing both at once.
I’m trying to think of other cool uses for this. Watch DVDs and add new recordings to the DVR? Hook up the computer and do stuff while watching TV?
Play two Xboxes at the sametime and become a YouTube sensation?