4K Blu-ray content on the horizon?

[U4K61]

Originally Posted by saprano

An iphone is massively small compared to a TV. The ipad3 is rumored to have a resolution of 2048×1536, but these type of devices need that resolution more than TV's since we're holding them inches from our face.

Roll out the welcome mat if you wan't. I'll join you. I didn't say i would never buy a 4K display. But lets be realistic about this stuff.

The PPI Post

It was about pixel density such as pixels per inch (PPI) - how many pixles do we have per in^2. "a 21.5 inch (54.61 cm) screen with a 1920×1080 resolution (in which wp = 1920, hp = 1080 and di = 21.5), we get 102.46 PPI; for a typical 10.1 inch netbook screen with a 1024×600 resolution (in which wp = 1024, hp = 600 and di = 10.1), we get 117.5 PPI." (Wiki). The iPhone 4: 326 PPI (gsmarena.com)

The new iPad
The 9.7" display has a resolution of 2048x1536 which is 3,145,728 pixels at 264 PPI. This is 65.92% more then 1080p which is only 1,920x1,080 or 2,073,600 pixels. Jason Snell of Macworld notes: "Pictures reveal small details that simply weren't there before. A photo that looks just fine on an iPad looks inarguably better on the new iPad. It's the same image, but all of a sudden, there's much more information there - small textures and tiny details that were previously omitted" (Macworld, May 2012, p38).

Caculating PPI using a² + b² = c²
If you know the Pythagorean theorem: a^2 + b^2 = c^2, you are all set.

Now let:
dp = diagonal resolution in pixels
wp = width resolution in pixels
hp = height resolution in pixels
di = diagonal size of TV in inches

diagonal resolution:
dp = (wp^2 + hp^2)^1/2

Now calculate PPI since we got dp:
PPI = dp/di.

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