The bigLittle Arm SoC that use dual core cortex A15 and dual core A7 look very interesting to me rather than S4 octa core that seems to be to overkill.

It can be a dual core or quad core.Much more power saving if the implementation is spot on. Considering that most app nowadays only capitalizing on dual core and if needed can turn on all core unlike S4 which is still quad core in reality.

Can current quad core SoC be used like that without the bigLittle?