Ok, so, it's not so much the size of the screen itself; I admit it's the size of the device that's the primary concern for me. I can physically hold and operate a Note or Note II in either of my hands, and it's a very nice device, no argument there. It's just that it becomes less and less convenient for me to carry it around. For similar reasons, that's why I have a 13" (33 cm) MBP and not a 15" one, or a 17" one. Larger is nicer, but it's just too bulky and harder to carry around.
I really don't at this point have a need for a tablet. I need the functionality of a real computer, and there just isn't the software I need yet available for tablets, with one (sort of) exception being Pages for the iPad. Not that I would buy an iPad; but The Document Foundation/LibreOffice.org needs to get their stuff together and compile a tablet-friendly version of LO. I'm also not really thrilled at the prospect of dropping $200-$300 on a device to read books; I'll just get the books and read them instead.