Personally I am trying to use as much multimedia as I can in my classes because I think that would be the students' preferences. However, I worry that this may cause a loss of the 'human touch' in teaching. Further, the students learn from one another and I don't want to lose that benefit of inclass teaching, but if I can structure the interaction through wiki's or other multimedia prevues, I would happily support the emerging technology.
The reason I believe in using is for the value it adds to the learning process. For instance I post all my presentations on SlideShare which makes it easier to log all the content presented for the course of the teaching, as well as enabling students to download, share and engage with them. Social media is another form of technology that I use either for flipped classroom pedagogical approaches or for reflective discussions and content sharing. It is convenient for students as most can access social media sites on their mobiles, and for its asynchronous communication, students can follow the discussions even if they weren't participating live (Twitter hashtag for example). Thus if certain technologies do not add value to the learning process, I would question the rationale for using it.
I use technology to support face to face interactions. I myself enjoy the intearcations and 50% of my students seek additional face to face interactions which I think speaks a lot about the relevance of face to face interactions for some students.