John Doom said:

Now to stay off-topic, we know 4k televisions' resolution can only be appreciated on a big screen (probably bigger than 30")... now tell me, how are customers supposed to bring them home!? I'm not buying it :\

You don't get the point. It is not about the size of the screen. It is all about the sharpness of the picture.

Some time ago I got Mac with 13" retina display (2560x1600 resolution) and worked on it exclusively for a few months. When I came back home to my usual 24" display with 1920x1080 resolution, whenever I looked at it I saw squares everywhere.

I can most certainly appreciate the high resolution even on a smaller screen.