[stephencanon]

> Sure, but there's a reason why you don't drive a car with a V12 engine, too.

Fortunately, phones are not cars, and engineers don't make design decisions on the basis of strained or completely bogus metaphors.

[IvyMike]

OK, let me state it without a metaphor: there is a tradeoff to be made when you optimize for raw horsepower no matter what the domain.

So as far as "do 64-bit processors have tradeoffs that are not worth it in current cell phones", I think it's still a fair question.