That depends on the viewer's vision and distance from the screen. 70" and larger screens are becoming more affordable so they will create a market for 8K. Even though 8K material may not be available, picture processing can noticeably reduce artifacts with lower resolution content and larger screens. 8K TVs have more powerful video processors than 4K which can produce a better picture. With any size TV, higher resolution screens will typically produce a better picture due to overall advances in panel technology. I'm not saying to go out and pay big bucks for 8K but if prices are reasonably close, the higher resolution could be a better buy. The same goes for 4K vs HD where prices are often very close.... peoples visual acuity can't notice any difference until screen sizes are 70" plus.