Because tvs are for a more casual user (think your 12 year old console gamer or adult occasionally watching a dvd or something on apple tv) they don't care about resolution unless its marketed as something that's a world better than what there use to (360p to 480p, 480p to 720p, 720p to 1080p and now 1080 to 4k) but a monitor is designed for like 1-5 feet away from your face and there for needs a very small dot pixel ratio and higher resolution. Also a pc enthusiast will actually know what the advantages to a new resolution are and not just that this resolution is better than the old standard and YOU MUST GET THIS NEW STANDARD!!!!