Epic Question regarding 'desktop forward render' for mobile what devices will it support?

Anyone in the know already what type of chips will be supported by it. Is it only snapdragon 865 and onwardq SOC or is it also chips like snapdragon 845 and 855?
Anyone from epic here who is allowed to talk about it. I am sure it would help more developpers in choice with future buy of smartphone if we get at least an idea of what harware we should have.