Should computer based programmes or studying online replace real classes?

I don´t think computer based programmes classes can not replace classroom classes, instead I would say a online class could be a complemement. Thus, for example, the teacher gives an assingment which Internet use is necessary, therefore the students have to search for information trough it.
In other hand there are some tasks in which it is necessary to get a hand from peers instead like team work, discussion, and to give a speech to a public.
Some disvantages are that some peole don´t have a power cut and they don´t have the chance to hold conversations and interchange opinions. This missing process don´t allow to develop themselves.