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.
Mom and Dad for sure; kids optional. A few inches here and there won't be a huge deal, so even if Mom's 6-foot-1 and Dad's 5-foot-2 you'll at least have a range. Now take what you know, like the height of the TV stand, and subtract that. For me, seated on my couch, my eyes are about 38 inches from the floor. So if I have a 22-inch TV stand, as long as the height of the TV from its base to the center of its screen is less than 16 inches, I'm all set.