The term 4k has been around much longer than 1080p, etc. It is a term from computer graphics and the movie industry which means 4096x2160 (17:9 ratio) or 4096x3

The term 4k has been around much longer than 1080p, etc. It is a term from computer graphics and the movie industry which means 4096x2160 (17:9 ratio) or 4096x3072 (4:3 ratio). I have helped build, test, and used "4k" tiled wall displays for scientific visualization. It is cool that you can now just buy a single monitor for the same purpose.