Now that we are in 2018, there is any reason for not have any emulator of Dreamcast and of the Dreamcast arcade based machines like Naomi, Naomi 2, Atomiswave, Hikaru, Aurora, Gaelco? Seem to me that is not the case. Snapdragon 845 with the One Plus 6 and Xiaomi Mi8 and Pocophone F1 with its hardware and with its optimizations of software are enough and more than capable for those emulations at full speed. But there are others capable chipsets like Exynos 9810, Kirin 980 and the futures Exynos 9820 and Snapdragon 855. But Snapdragon 845 is more than enough for that emulation at full speed.