friend doesnt think bluray is that much better than dvd?

[AutomaticDriver]

sorry if this isnt the right forum for this question. I have a friend and he doesnt think bluray is that much better than dvd as far as the picture goes. he has seen the same movie on dvd and bluray and still doesnt think bluray is as great as people say it is. Is there anything I can prove to him that bluray is better than dvd. I tried the picture quality route but that dont work, he just says he really cant tell the difference. I guess I could tell him all the facts about dvd compared to bluray.