This question pops up a lot. I will eventually get around to writing down my own ideas on this, but for now I want to start by laying some background. What are other people calling emerging or emergent technologies?
The University has been paying attention to this for quite a while. CRLT (Center for Research in Teaching and Learning) spends a lot of time on connecting new technologies with instruction. The Enriching Scholarship series every May (for the past decade!) has focused on bringing new and innovative technologies to faculty attention.
Last year, the 10th annual Enriching Scholarship week, they invited as a keynote speaker Bryan Alexander, who spoke on emergent technologies. Here are his slides from that presentation to get a sense of what he was thinking of as emerging tech.
Emerging Technologies Librarian 