Jason Schreier from Kotaku posted this yesterday:
"@fefeyeh1 To answer your Q from a couple weeks ago, I played on Switch (handheld mode only) and it looks good, some framerate drops but mostly stable 30fps. Looks better on PS4 but I'm happy to sacrifice that for portability"
Lol, I don't know what he played but it isn't stable anywhere (specially because it's open fps) and the first area makes it pretty clear, you all played the demo, what do I need to say.
Second area tho has pretty good framerate because it's on open field a lot, but still "mostly stable 30fps", l m a o.
And it doesn't even really look "better" on PS4, it's surprisingly equal, what is he talking. :D