That beautiful football shot isn't 8k

4k isn’t 4k pixels across, it’s a borderline incorrect term that means 4x the resolution of 1080p (1080 is close enough to 1,000).

The reason this is a bogus term is that 1080 is just the vertical pixel count and 2160 (4k) is only actually double that. The overall resolution is 4x greater but the numbers we use to measure resolution and what the term is based on are doubled