I think their version of cheaper and lighter will be the next step up from the A4, i.e. something ARM-based for their iOS devices. By avoiding the Core iX chips

I think their version of cheaper and lighter will be the next step up from the A4, i.e. something ARM-based for their iOS devices. By avoiding the Core iX chips in the 11"/13" devices in favour of a faster GPU they've already demonstrated they're not keen to sacrifice computing power below a certain level.