I don't get Google's reasoning. A premium product should never be worse than it's mainstream cousin. A Cadillac would never have inferior components than a Chevy. Buyers of top end products aren't price sensitive, if they needed to charge $2100 instead of $1800 that wouldn't reduce sales, in fact it the opposite if the premium product was better in some important way and at least as good in every other. The only reason I can think of for using inferior components in the top end phone is power consumption. Screens are power hungry. Batteries are heavy, doubling the weight of the battery to handle the extra power required by the second screen might make the phone unwieldy. The solution might be better batteries, there would be a cost associated with higher energy density batteries but on the top end product that should be something that can be passed along.