[abalone]

They'll probably follow what they just did with the A10, at least in the near term. It has a low power mode and a high power mode, but doesn't run them simultaneously. Too complicated. It actually has 4 cores (2 low, 2 high) but can only run one pair at a time.[1]

So while that is similar on its face to hybrid graphics, I'm not sure it would be feasible to offload background tasks to the low power mode as it would be constantly switching modes every few milliseconds. More likely this architecture is better suited to Power Nap where the whole device enters a low-power state with restricted functions. That also sidesteps the issue of having to compile every third party app for two architectures. They can just implement the Power Nap stuff for ARM.

[1] https://en.wikipedia.org/wiki/Apple_A10