"...tech fans crazy for sharper resolution are sometimes paying for more pixels than their eyes can actually see."
Right now, Blu-ray discs crank out a 2160p resolution and a 60FPS (frames per second) streaming up to 4K. While 4K TVs display a resolution of 3840x2160. That is four times higher than HDTV.
HDTV is referred to as 'retina' resolution, and since 4K is technically four times more detailed, experts say that the human eye can not even begin to distinguish the difference between HD and 4K resolution.
And yet the major TV manufacturers make claims such as
"...four times clearer than HD." (Sony... not inaccurate, technically)
"...a new form of fulfillment" (Samsung describing what was once priced at $40k)
The thing is, Sony pushes the sales pitch by inviting people to see the difference and if you are expecting it, you will probably see it.
Is 4K better than HD 1080p? Sure it is.
As implied, 4K UHD has a much higher resolution than 1080P HD. 4K resolution is 3840 x 2160 pixels, while 1080P is 1920 x 1080 pixels.
OH, and BTW, the human eye can perceive up to 1000 FPS, so when some tech exceeds 60 FPS, you will be able to take advantage of the tech.
It seems that as technology improves, companies will do what they can to capitalize on the new tech, selling it as best they can, while, in the case of 4K screens, not making a huge difference in what you really can see. But they hope no one sees their advertising and decide to research against their claims.
Most folks don't verify advertising claims but rather, believe that which is pitched to them. This is why in television, the advertising industry is a twenty billion dollar industry, per TV season.
But in the case of 4k, experts are saying there's a stronger advertising case for 3D TV than there is for 4K.
But then you might ask, will 4K help on a very large television that I might buy? Not really.
"A person's field of vision covers about 200 degrees, a little more than a semicircle. At arm's length their index finger's fingernail will appear to be about the width of one of those degrees. Imagine that fingernail covered in 120 alternating black and white stripes — being able to discern those stripes at that distance is just about the theoretical limit of the human eye."
So if you were one of those that jumped at the opportunity to drop $40K or even $3K on a super cool, better than ever, 4K TV, you wasted your money.