While I get your enthusiasm, I have to disagree. For one, features of Uncharted 4 stand toe-to-toe with it (especially character models). Next, the other games you mentioned all have aspects that exceed Horizon in a way that will ensure they won’t look dated anytime before it does. Art is one thing. The technical side of Horizon, while still marvelous, falls short of God of War and I won’t even mention Metro.
I say just enjoy the accomplishment the game achieved at the time. Its clean aesthetic is great on its own.
Now if your talking Metro exodus on the PS4 I disagree having finished it on the Pro it has some lovely effects one but parts stood out, an example I was looking at a debris field made up of splintered wood floating in an underground channel, obviously it wasn't a place you would venture into Artyom isn't a good swimmer but just passing close by I was shocked not that it was lo res but it was flat like those flat textures you would see in PS2 games that looked to be 3D till you got close, and while that's extreme there were lots more examples of low quality texturing ,then you have all the bugs,so for me Horizon came across as a more competent game from an overall perspective regarding it's graphics and looks than Metro were the margin between it's best and worst was a lot wider , now having said that The PC iMetro is a different beast but who's to say what Horizon would become if it was made for PC.