Sony has just trotted out the Vaio NW, their new line of Blu-ray equipped, mid-market notebooks, and at 3cm, they are quite slim too.
Historically, Apple loves cleanly delineated product lines, so the “MacBook Pro” re-shuffling seems strange even if the socialist element is a fun side effect. Unless they’re clearing out the MacBook for something else entirely.
Even built into the shape of a semi-stiff chassis, aluminium can bend. Especially when it goes head to head with a truck.