Apple engineers are planning to offload the Mac’s low-power mode, a feature marketed as “Power Nap,” to the next-generation ARM-based chip. This function allows Mac laptops to retrieve e-mails, install software updates, and synchronize calendar appointments with the display shut and not in use. The feature currently uses little battery life while run on the Intel chip, but the move to ARM would conserve even more power
However, Apple has no near-term plans to completely abandon Intel chips for use in its laptops and desktops
http://daringfireball.net/linked/2017/0 ... an-arm-mac