It looks very likely to be the case that Motorola will be charging a little extra for the wooden backs on the Moto X, and by a little, I mean in the neighborhood of $50 compared to the plastic X. Is there $50 of wood, workmanship, and assembly there to justify this premium? Of course not. It's an option that, like most "premium" add-ons for everything from cars to kitchen appliances, is there for those people willing to pay to get it. No one needs a phone made of wood, aluminum, or rich Corinthian leather. It's an upsell, and if you think you're generally going to get a "fair" price on an option that isn't included with the base model product, you're probably deluding yourself.