High end processors - impact to video quality

So i have a nice lg 4k smart tv with hdr which is nice. Most of my video comes from netflix, prime, hulu, youtube, etc thru apple 4k box, really nice. Occassional bluray disk.

so what will all the fancy video processing capabilities of a high end processor do for me? Seems like alot of hype that may not yield much improvement beyond what im getting.

I am buying a better processor moreso for improved audio.