Here is my analysis for HW requirements:
GPU: Wild Life will not run smoothly and with good graphics on anything under R270.
Basically embedded Intel CPU graphics solutions will produce horrible stuttering, and you need at least 3GB dedicated VRAM (128bit or better. 64bit will cause stuttering). On AMD RX480 8GB I get 35-45FPS and 5.5 GB GPU vRAM dedicated and used by the .exe for 4k@2xSS.
For 4k perhaps GTX1050Ti would fetch 30+fps.
For 1080@30+fps, R270 may be sufficient.
CPU: Dual core 3.5GHZ+ per core minimum. I see it threads very well. On Ryzen 1600@3.8Ghz when allocated to just 1 CPU thread it reaches 100% CPU on that core where the thread is allocated. If given all threads on a R1600@3.8 on all 12 CPU threads, it averages under 10% on any core (windows CPU task scheduler will randomly place the threads wherever there's less load). Dual cores are fine, the R1600 shows ~50% usage when game .exe is allocated to 2 cores (no HT). Mobile CPUs will struggle to get 60fps mainly due to frequency shortage (maybe cache as well) especially if paired with good GPU. The physics is quite well done, meaning it really needs about 3.5GHZ+ CPU pwr per core. Thats the power of a good engine choice. The bare fact I can move its threads around cores, without the game crashing, not even paused, shows the prowes of UE4!
RAM: 1.5GB used by the .exe, so with Win10 we need about 8GB to be on the safe side.