Why is Samsung not using A15 in the upcoming Galaxy products? It's because A15 is a power hog and cannot be used in a phone. The big.Little band-aid does not work. Nvidia and Qcom both did not implement big.Little because they knew it would not work. Tegra 4 will not work either. The only ARM SoC standing will be qcom snapdragon but it will pale in comparison to Intel's upcoming bay trail. Watch for a flurry of phone design wins for Intel in the upcoming months.