Settle down... I think the game looks fantastic as-is just not the hair on most human NPC's. Dunno how exactly NV hairworks... uh, works, but it's not exactly the same as advertised on the GPU maker's site.
That wasn't meant to be directly solely towards you. Since the resurgence of The Witcher due to the show, I've been seeing a lot of comments all over the internet along the lines of "I thought this game was supposed to look good". Replaying it now, I still love just riding around and looking at the scenery (plus that opening scene once you step on Yennefer's balcony in the intro still gets me). Though I still don't understand what people are wanting in terms of better graphics. Maybe I just need to see some side-by-side screenshots of a fully-modded Witcher 3 vs vanilla.
I do recall a texture pack that was incredibly popular back in 2016 that everyone was using and to me, it looked like someone just made the texture edges more prominent and fiddled with the HDR. There was a "Better flora" mod as well that actually made the grass and weeds look better, but at a massive cost to performance.
As for hairworks, from my understanding, that was supposed to only affect Geralt, though I'm probably wrong about that. I never noticed anything special about NPC's hair before and after, but there was a noticeable difference with Geralt's hair when I was first testing if my PC could handle the game maxed out.