After the release of the iPhone 6 plus, I'm seeing so many comments such as 'why didn't they put a 2K display in it'.
I was certain that 1080p is 2K, since it's 1920 which is rounded up. The same applies to 3840 - it's 4K (both 16:9).
People are referring to what I thought was sort of 2.5K - 2560x1440
Am I wrong or are others wrong?