It's still a fantastic looking game to my eyes. The weapon models and animations in particular are beautiful and have some great attention to detail, such as water dripping off them if you wade through a river.
They introduced some great concepts too, some of which have come from previous games. Things like detachable bayonets (which affect more than just your melee ability), being able to swap between optics and ironsights (whilst maintaining individual range settings for both) and being able to fold the stock if you weapon has one, to give you faster weapon handling at the expense of being able to shoulder and use the sights properly. I know the game has it's flaws, but I love the effort that's gone into things like this.