I will have to disagree with the “It’s the first handheld” part, because I think Nintendo did everything possible to turn it into a real hybrid. Where you see that they got this is how people use it differently. Personally, I barely use it as a handheld and some games only need the big screen. But others play it both ways and some even mostly handheld. This is the Switch genius … Well, part of it. But the price was lower, yes.
Anyway, since I can’t compete with the two (actually 3, because PC games are constantly growing), the Beast Power Switch is a perfect place for unique games. They already have a lot, but if third parties are smart, and some like Capcom seem to be, more exclusive games should go with the occasional port. Astral Chain and Octopath have both sold over a million copies each. Nintendo creates great games, but can’t eliminate them enough on their own, so third parties should be looking at sales now! It’s time 
In my opinion, Nintendo should work with third parties for Pro. This way, not only MP4 and BOTW2 will use them well, but some third-party games may be part of its release. And he would still be in the Switch family and will continue to sell for a few years until he succeeds.
It’s about providing new gaming experiences for all Switch owners.
This could also mean supplements, which can be difficult. PSVR worked for Sony, but Kinekt for MS … Not so much. But hey! It’s Nintendo. They like to surprise us.