Check out this video. I remember discussions about the future in the early 90s when we talk about being able to click on the person within a video and get more information about that individual. Well, this is one example of how that is a reality. The educational ramifications are pretty amazing. Think about an assessment requiring you to watch a video and clicking on the "unsafe" happenings, or taking a live video feed of a terrible accident and embedding clickable annotations of additional content to offer different perspectives or more information. Way cool.