This is an area I'm keeping an eye on - currently this 55" Gigabyte one is about as good as it gets, but it feels like it's straddling the line between monitor and TV, as it runs Android and supports CEC and eARC.

https://www.gigabyte.com/Monitor/S55U

Once a company like Iiyama, Dell or Philips releases a 65-75" model with Display Port, I'm just going to buy it. Fingers crossed they do.