This is a wild idea, but there is precedent in the example of the dual-graphics systems. That said, I'd be very surprised if Apple implemented this initially i

This is a wild idea, but there is precedent in the example of the dual-graphics systems. That said, I'd be very surprised if Apple implemented this initially in the MBA first. Maybe the MBA will move to A5, then down the road, the high-end laptops will go dual Ax/x86. One approach might be to expect a multi-core Ax machine with a single Ax core dedicated and custom designed to emulate an x86... Might be worth keeping an eye on Apple job ads, since we know they have used emulation techniques in the past, such as Rosetta.