That would indeed be an interesting setup, kind of like the big.LITTLE configuration popular on a lot of high-end ARM processors. I'm sure it could be done...

That would indeed be an interesting setup, kind of like the big.LITTLE configuration popular on a lot of high-end ARM processors. I'm sure it could be done... but probably would have some interesting effects on software (unless you do full x86 emulation on the ARM cores... but then what's the point). It's far more likely we'll start seeing ARM processors with hundreds or thousands of cores in the server market first. These would be particularly interesting to virtual server providers like Amazon, Google, Digital Ocean and others.