As a 30-year latex user and a 10-year newbie to vim, I am impressed by the author's skills, and will likely copy some of his macros. However, as someone who has taught mathematically-inclined material for those three decades, I cannot recommend using a computer to take notes in class, for I have simply never seen a student who found that effective.
Although some students try to take notes on a computer during the first day of my classes, I have never seen one who tried to do that after the second or third lecture. The paper method (or, equivalently, using a stylus to hand-write on a screen) is simply better suited to the dynamic of a class. An effective class is not a linear presentation of material, a sort of recitation of a book by a professor. And effective notes are not transcriptions of the class material. An effective class weaves around through a topic, building on interactions with the students. This often involves departures from a simple path that, transcribed in real-time, would be footnotes within footnotes within footnotes, "Inception" style. And of course mathematical material tends to involve a lot of diagrams. Hand-written notes, with lots of arrows between ideas and boxes with sketches, are not just a good way of making a record of a class, but they are a great way of understanding what's going on in real time.
The only place I could see this detailed note-taking method working would be in a class where the teacher essentially reproduced a book in class. But is that the kind of class that justifies the cost of tuition?
I have two anecdotes I'd like to share.
1. A student came to me to ask a question about something that came up in class. I asked to see her notes, to get a clearer idea of what was confusing her. The notes were amazingly insightful and clear. I asked how she took those notes, which contained some things I had said and others I had not said. She replied "I don't write down what you say, I write down what I think you mean." This student will likely be a professor in a few years, and I envy the students who will take her classes.
2. Last term, I recommended that my students try the Cornell note-taking method. (See http://lsc.cornell.edu/notes.html for an example, although there are many treatments of the method online, including videos.) The students who tried it seemed to enjoy it, and it may be no accident that the class leader was one of them.