I guess that Apple would have the resources and knowledge to create an extended ARM architecture that could match x64 in the same power envelope, if they really really wanted.
The market segment isn't that large though so it seems tough to get it done within the laptop budget. Still, it could benefit the other devices and streamline the hardware development, so maybe they think it's worthwhile.
The market segment isn't that large though so it seems tough to get it done within the laptop budget. Still, it could benefit the other devices and streamline the hardware development, so maybe they think it's worthwhile.