From the Wikipedia article you cited: "...Design patents can be invalidated if the design has practical utility..." Besides that this is a "natural evolution o

From the Wikipedia article you cited: "...Design patents can be invalidated if the design has practical utility..." Besides that this is a "natural evolution of design" and using key design formulas some known since more than 2000 years (e.g. golden ratio http://en.wikipedia.org/wiki/Golden_ratio http://en.wikipedia.org/wiki/Golden_ratio), this (practical utility) IMHO is a similar and one of the strongest arguments against these Apple patents here. The radius of the corners is given from the size of the screen and the width of the bevel, the width of the bevel by the size of an average person's thumb size, the location of the button generally how you hold the tablet and so that you can easily reach it (upright & sideways).