4K = 1080P x 2?

[Galaki]

OdinHades said:

1920 x 1080 = 2073600
3840 x 2160 = 8294400

So 4K is exactly four times 1080p. It's the pixels that count, nothing else.

edit: meh, too slow.

Going by that, it should be call 8M, not 4K?