It's not so it can 'now' be played on mobile devices, but instead so that when there are mobile devices capable of running Dolphin, Dolphin will be capable of running on them. High-power low portability ARM devices are just a nice test platform in the mean time.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT