Should computer based programmes/or studing online replace real classes?

I rekon that studing online is a really good oportunity for students to know a new way of study and also to comunicate to people around the world and hold concersations by chats and forums which has to do with education and other topics about their interest. But not always computers help people to do home work or things like that, they can also entertain people serching for things of their interest, like music, movies, famous people, etc...
Sometimes students get distracted with some web pages and that is not so nice when they have to do something more important as a homework and they can spent hours playing some games and not doing their homework, so that is not a good part of this, there are moments to playk, But personaly I think that computers are very good complement and help for teachers, but not necessarily a replace.