That was part of my point. PS got into handhelds, motion controls, etc, because Nin proved it could be done and in a way that made lot's of money. The odds that PS doesn't try a hybrid like the Switch are unlikely. The main reason I could see PS truly leaving that market sector entirely, is if they focus solely on PSVR from now on instead, which they just might do since they have that market to themselves and probably will continue to in the foreseeable future. Mind you, a PS hybrid should fix the Switch mobility cross play issue if they felt they needed to directly address that.
Crap, I really don't think going hybrid would be a good idea for Sony. Or at least they have to offer a full fledged home console PS5 as well. The current Sony model is clearly working, so it'd be a mistake to make a sudden 180 just to try and copy what Nintendo is doing. I think Ninty has the portable market so well covered that it's no use trying to push into it. The Vita is a testament to that, I hope they at least broke even with that thing..