Vulkan graphics API aims to preserve battery life while bringing console quality graphics to the palm of your hand
Pretty graphics are great and all, but they put a significant strain on the CPU and require much more energy to be drawn from the system, which consequently results in decreased battery life. This is one of the problems Vulkan is aiming to solve before you can wreak havoc in GTA V on your smartphone. In the video comparison below showcases not the huge improvements in graphical fidelity that can be achieved with Vulkan, but rather how the two APIs are set apart by their utilization of multi-core CPUs and power consumption.
Even at the infancy of software development for Vulkan, the benchmarks show that it is at least 15 percent more efficient when it comes to power consumption, and that it is much more apt at multithreading, allowing it to balance the workload across multiple CPU cores, instead of putting the load on a single core.