Let's assume the device is focused on creativity - drawing and writing (also assume the device records pen input well and has a retina screen):

10" tablet screen size ~~ display size of a legal pad.

7" tablet screen size ~~ display size of a large todo pad.

I like using a legal pad already for drawing/note-taking, but if the fact that it's electronic let's me express what I want with less screen space, It may be worth getting something smaller.

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I also can't get around the author's idea of carrying an EVO in my pocket. Especially If I plan to use the same device while running/cramming into jeans/etc. It's definately a great purse-able phone for women though.