Regarding what Damiani was saying, it's true that the Switch doesn't have complicated gimmicks, but i don't know how straight forward it is to port a game, when the HW is still severely under powered compared to the competition, and it's running on Nvidia chips instead of AMD ones (ok, that's not a big deal, especially if there's a PC version, but it's still something to consider, given how close Xbox and PS4 are).
I guess my point is, i can't see someone like R*, reworking their game to fit into a lesser HW, especially if those changes are fundamental in structure to the game design.
And i don't think porting games to WiiU, HW disparity aside, was that big of a deal for most developers, since most of them, Nintendo included, seemed to just ignore the dual screen thing in the first place, beyond slapping a menu on there.
The problem was the old HW, as i mentioned above and, especially, the non-existent install base.