Just started playing around with D4 on my Studio today.
I saw this https://www.youtube.com/watch?v=SbTo6aB2DEg which seems comparable in specs to mine, albeit a MacBook Pro.
It seems to have mostly 60 FPS at 1080p pretty constant, rarely dropping, whereas that's not the case for me on High settings.
I also don't see much of a performance impact from running at 1080p vs my native 3008x1692.
Curious what experience others have?