Well, on some tvs, depending on the type and its age, (especially including rear-projection tvs) there is a posibility of burn-in. However, I'm not sure if the newer game systems have any function that can prevent this. The Xbox 360 will go into screen-saver mode after a few minutes of inactivity, but I still see a pontential for burn-in. Either way there doesn't seem to be any difference between a PS2 and next-generation systems when it comes to screwing up tvs. So your friend is partially right...or partially full of shit.