The only point against it is that we would loose the human touch. While studying in a college, over all development of the personality of a student is possible. They get a chance to mix with other students, which helps in their growth. The same is not the case with learning through television. Learning through non-humane medium has its own disadvantages like for instance we shall miss the occasional pat on the back by the teachers and also probably the scoldings.
Human touch is very important in the imparting of education.
Let me cite an example from the profession that I belong to that is the medical profession where the physician's touch is considered to be the healing touch. Which will miss if an artificial medium comes into being. But I feel these methodologies is the need of the hour.