Unity and ARM have worked together to implement optimizations to improve graphical performance for the ARM Mali GPU as well as to make it accessible to developers using Unity. With the large catalogue of Unity-authored titles, Mali-based devices now have a huge selection of high-quality games with console quality visuals populating devices.
If you're interested in this video and want to learn more, you should also check out this presentation written by our developer education team Optimizing Unity Games for Mobile Platforms.