I largely agree. I'm very much coming at this from the angle of 'knowledge work', and think a system of this kind is most useful to (though definitely not only useful to!) scientists, engineers, designers, lawyers, journalists, etc. While the population of knowledge workers is admittedly much smaller than the population on the whole, though, it's still sizable. Knowledge workers play an incredibly important role in our society, and anything that can amplify their intellectual capabilities is well worthwhile in my view.