GPU at least as powerful as PS4 Pro from 2016. So GTX 1060 power level at least.
PS4 Pro is too much in the mobile space for 2020 unless it is a large device like the iPad Pro (Beating the PS4's CPU is easy, the GPU part is hard because we want to use less than 30 watts max total). We can beat the PS4 easily enough with a 7nm version of a mobile GTX 1650 max q chip however. Who knows what nVidia will launch for laptops later this year, but their slowest chip on 7nm will beat the PS4 easily.