Understanding the Microsoft Surface (a sort of Review) (hal2020.com)

Very nice analysis, and a good antidote to some of the other reviews floating around.

A4 paper is 210 by 297 millimetres and that aspect is very, very far from 16:9 ratio. iPad ratio: 1.33, A4 ratio: 1.41, wheras 16:9 is 1.77.