I was thinking "Macbook" to "Macbook Pro". I think that's the wrong way to think about this machine. Think of it instead as "iPad Pro" to "Macbook Pro". This is the convergence; rather than shipping two completely different product lines, they're gradually migrating them towards each other. This is what everyone wants, for the same reason that no one wants sports cars or pickup trucks, everyone always wants SUVs and nothing else.