YouTube no longer considers 720p as high-definition...

[Pemalite]

Conina said:

hunter_alien said:

And to add to the confusion Full HD is also sometimes referred to as 2K : https://en.wikipedia.org/wiki/1080p

So yeah, its an advertising name and nothing more. Lately, we see a trend to push more "quality" pixels rather than "quantity" pixels anyways, as we see less and less return by simply pumping up the numbers. I had the chance my first native 8K content on an 8K screen a couple of months ago, and man is it underwhelming. If you don't plan to buy a >200cm diagonal TV, forget about it.

I never understood people who refer to 2560x1440 as 2K.
2.5K or 2.6K would make much more sense.

If 3840 is rounded up to 4000 (4K), then of course 1920 also has to be rounded up to 2000 (2K).

It's just a natural progression.

2k is 1440P or 4x 720P or QHD.
4k is 2160P or 4x 1080P or QFHD.

Sure 2.5k could be used, either way... I will probably personally keep calling it 1440P and 4k... 2160P out of convenience.