I think when we would not need sleep we would use most of that time for other things thenthan education. I guess some people would use that time to study but probably that would not be the norm.
I am almost certain that if we could literally learn in our sleep we would completely stop learning while being awake. It just does not seem time efficient anymore.
Also there would be a lot more people with higher education and time to work. Which would mean less people work or more people work less time (which is already a trend now due to automation). I think the whole economy would be changed along with the education system.
Also life long learning is a trend (at least in Europe) and I can imagine that being amplified.