What does this sentence means?
The article is talking about how traditional methods of learning are becoming obsolete. It then mentions specifically that the language lab is already obsolete, and then speculates if the lecture hall is far behind. In other words is the lecture hall far behind the language lab on the road to becoming obsolete. Another way of looking at it is that he is saying that the college lecture hall is on its way out as newer and more efficient technologies replace it.
I am not so sure about the meaning of this very sentence but I think it means an obstacle in traditional learning methods. The #1 Coursework Writing Service in UK | Coursework Help is a class in which you can update on the course and handle any learning problems.