Nintendo doesn't do standard generations anymore, or at least don't compete for generational standard graphics. That's why Breath of the Wild still looks uniquely beautiful. It's not focused on pushing raw graphics or visuals but it's own distinctive art style.
Halo Infinite however was first teased two years ago with a big 'Powered by the Slipspace Engine' tag. DF even did their video analysis on that trailer back then, and it's rather funny (not in a good way) how it's aged.
So even though we knew it'd be cross-gen, we still expected them to be pushing the boundary with their technology.
I don't know what you mean by standard gens but Ninty is most distinct from generation to generation. All Xbox and PS consoles have just been boxes with more graphics and basically the the same controller scheme but more refined and a few tweaks. Ninty has had all sorts of wonky gimmicks and controllers to define generations.
Regarding Xbox and Halo, my point is it doesn't matter what you or I say or whether or not it ends up looking a lot better than it does in this build or not, it will sell a shit ton and it will sell a lot of Xbox series x consoles as well. That was my basic point. The name Halo itself will make sure of it.
But I do agree that Ninty has made breath of the wild in such a way it will still look gorgeous after maybe even a few decades while Halo will look aged in 3-5 years.
Just a guy who doesn't want to be bored. Also