8K is four times larger than 4K footage, which translates to a brighter, sharper, and more detailed picture. It also means that the footage can be viewed much closer on larger screens. But looking better ultimately depends on where the 8K footage is going to be shown. If the footage that you are shooting is likely going to be watched on a smartphone screen or a laptop, the quality difference won’t actually matter much. However, if the footage is going to be shown on a massive screen, shooting in 8K rather than 4K will make a difference.