The 'Australian Capital Territory Department of Education and Training' have produced a quite comprehensive basic guide to emerging technologies.
It begins with sections looking at the wider political, educational and technical context, before moving on to focusing on individual technologies.
The sections on specific emerging technologies cover everything from Interactive Whiteboards to Podcasting to Tablet PCs, including links to case studies. They also list possible educational benefits and issues related to the use of the technology. These sections might be a useful starting point when looking at the current and possible future use of these technologies.