One of the things that I found interesting was that as you become more expert in a field you take less notes. At the start of your PhD everything is new but by the end you know the name and research group of everyone in your field.
What does not go away is the need for a flexible and low friction way to collect and organize things like journal articles. Some sort of mental ontology about your field replaces the need for actually writing lots of stuff day to day.
Love the concept and from the demo it looks well executed, defintely will try when I hop on a mac.