A53s are the low power (&amp; low performance) 64 bit ARM cores.  They are sort of equivalent to the 32 bit A7.  A57 is sort of equivalent to the A15 - high power and high performance, so not quite so useful for laptops.<p>Having said all that:<p>- I have a Samsung Chromebook 2012 which is dual A15.  It still has great battery life.<p>- What&#x27;s really going to be interesting are laptops based around the 64 bit big.LITTLE, for example the Snapdragon (either dual or quad A57 + quad A53), where, if the kernel is smart enough, you can trade battery life for performance depending on what the user is doing.