Who do people think that if the case is smaller, the price will be too?
If that were the case, a Ferrari would be cheaper than a Lincoln.
Well, guess what, this new computer is a Lincoln with the engine out of a Ford Focus.
In order for apple to make the case smaller, they have to re-engineer the computer. They have to make new outside panels, inside panels, basically, everything. If they make a single processor unit from a dual processor one, all they have to really do is not put only one processor in - not two.