The ownership of a copyright, or the ownership of any of the five exclusive rights afforded by a copyright (discussed later in this article), can be transferred to another and is regarded as Personal Property upon the death of the copyright holder.
For a 65-inch screen, the distance increases to 77 inches, or 6.4 feet. For an 80-inch screen, it's 95 inches, or 7.9 feet. You can do the math in reverse if you're trying to select a screen size for a predetermined viewing distance: Viewing Distance x 0.84 = Screen Size.
However, bear in mind that because of the extra detail in the picture, you can sit a bit closer to the TV screen and still watch in comfort. For example, with a 40-inch 4K TV you can sit around 8.3 feet away from it. For a 50-inch, that goes up to 10.4 feet and for a 55-inch 11.4 feet. Ultimately, though, how close you sit to your TV - whether it's a HD or 4K model - is down to your own personal preference and the way you've set up your living room.