Assuming it's similar to the S-video out on a TiBook, I can say that the computer monitor picture is disappointing: you just don't realize how much higher the resolution on your computer is until you see it projected on the TV. Showing iPhoto slide shows is similarly disappointing--you'd be better off just having your friends crowd around the eMac. However, if you just want to play DVDs using the eMac, I've found the DVD output to be comparable to a regular DVD player. The audio-out might be your limitation there.