For me as a student, I recently bought the 12 inch Retina Macbook but I am missing the stylus input in the mac lineup, because I read lots of PDF and highlighting and note taking is key for me, that's why I also own a Surface Pro 3 and use it as my study device which is actually awesome.
But for me the perfect machine would be a more powerful iPad Air 3 with the same size, but with stylus inking, I really don't care for an iPad pro, because that is what I use my Macbook for.