I'm not sure what to make of the asymmetrical shape. It does seem functional. I almost always hold an ereader with one hand, and when my hand does get tired it's mostly from the feeling of weight extended out. This solves that completely (sans case at least) as the weightiest part would be resting in my hand.
On the other hand (
), it just seems... odd. If this is the premium design, I'm not really sure if it looks so premium. It's so different that the leak almost seems fake. I'll be interested to hear what other new features and improvements it has.