For me, I don't think teachers role will be changed drastically in this new learning environment. Many teachers worry about teachers will be replaced by technology. It is not necessary at all for teachers to panic, for teachers' role won't be undervalued by technology. In turn, teachers' role is more important to help students survive this fundamental change of learning and guide students to gain the ability to stay current while knowledge is changing fast. Teachers is still like a guide to guide students and introduce them ways and methods to acquire the ability to share and connect with each other.
The way of learning is changed from linear learning to a more complex way. As Siemens mentioned in his video that: "The network is the learning." (Siemens video) What teachers should do is to concern students' desire to express their ideas and guide them how to find an efficient and appropriate way to contact with others and build up a net work so that they can stay current with the knowledge. As Siemens indicated in his article Connetivism: A Learning Theory for the Digital Age that: "This amplification of learning, knowledge and understanding through the extension of a personal network is the epitome of connectivism." (p 8).