Phil Spencer of Microsoft thinks this idea doesn't make sense because they haven't been doing it well in years. The big innovation with Halo Infinite is live services and an open world. Their exclusives aren't doing anything other games aren't.
Sony is a bit better and covers a few more genres, and if you're into heavily-cinematic games, Playstation is your no-brainer choice, they've got you covered in all sorts of genres. And they've got the Spiderman games.
Nintendo, meanwhile practically owns the kart racing genre. There is literally no other AAA effort that isn't cash in crap or loaded up with so much MTX crap that even Fortnite would blush.
Mario Oddesey might have a bit more competition nowadays but in 2017, your only options were Oddesey, a (very good) indie game, and a neutered reboot of Ratchet and Clank.
Breath of the Wild came at a time when most open world games were very rigid when it came to how players dealt with tasks and enemies. BoTW gave players a lot more options thank simply going in quiet or loud, and ToTK took it much further. They practically changed how other companies look at open world games.
Nintendo puts AAA efforts into entire game genres that most other companies ignore entirely, even if the audiences do not. This is how they've maintained crazy Switch sales.