uh...
Me thinks not. 12" powerbook has a different footprint and arguably more functioning screen space than the current 13.3" macbooks since the macbooks are widescreen. 13.3" across a longer rectangle isn't the same as 12" across a albeit shorter one.
They need to make it smaller than 13" to attract the crowd that loved the 12" PowerBook form factor.
Me thinks not. 12" powerbook has a different footprint and arguably more functioning screen space than the current 13.3" macbooks since the macbooks are widescreen. 13.3" across a longer rectangle isn't the same as 12" across a albeit shorter one.