One of the criticisms that I read concerning the books coming out for 4th Edition D&D is that the print is 'too big' and that there is 'too much whitespace'. I can agree with those critcicisms if you just consider them from the standpoint of word count for your money. However, I belong to a very specific minority that highly benefits from the design of the new books - the extremely nearsighted.
My vision is very poor. Without glasses or contacts I am effectively blind. So I am actually very pleased that the new 4th Edition books have larger print and plenty of whitespace. It makes them much easier to read for me. I doubt that consideration for the myopic was behind this particular design decision, but I will still happily reap the benefits.