NBC News has just published a blistering attack on the new UltraHD 4K sets, concluding they are likely not worth your time. According to the article at the regular sitting distance, tech fans crazy for sharper resolution are sometimes paying for more pixels than their eyes can actually see.

The 4K TV, which is sold by Sony, Samsung and Panasonic, purports to offer a resolution four times greater than today's 1080p HDTVs. But the NBCNews.com article quotes numerous display and vision experts as saying that the average human eye can't detect the difference between a 4K TV (3820 x 2160 pixels) and a 1080p set (1920 x 1080.)

Adding more pixels to the screen may sound like an advancement, the experts say, but you can only see the extra resolution if you sit a few feet from the screen or buy a set with an extra-large screen, such as Samsung's 84-inch 4K TV.

Don Hood, a professor of ophthalmology at Columbia University, tells NBC News that "there's going to be some density beyond which you can't do any better because of the limits of your eye."

Raymond Soneira, the head of the display testing firm DisplayMate, agree and adds: "A regular human isn't going to see a difference."

In a typical living room, a viewer's 40- to 60-inch TV is positioned at a fixed distance, probably seven to nine feet away. Unless pixel-hungry TV fans buy far larger set, or push their couches much closer, any increases in resolution simply won't be perceived.

Enough pixels already! TVs, tablets, phones surpass limits of human vision, experts say - NBC News.com