This is very useful, personally I can see this working in lectures of all sorts. I wonder if this could be further expanded for social web annotations, like web

This is very useful, personally I can see this working in lectures of all sorts. I wonder if this could be further expanded for social web annotations, like websites have had in the past. It could have groups/tribes (example: HN readers) to which you could subscribe and read their annotations. Kind of like Hypothes.is [0] or Diigo [1]. [0] https://web.hypothes.is https://web.hypothes.is [1] https://www.diigo.com/premium https://www.diigo.com/premium