Why are 4k displays so expensive/hard to produce?

[Yeti89]

Why are 4k displays so expensive/hard to produce?

There are smart phones with 1080p on their little screens and we have tablets and notebooks well past 1080p. I don't understand why a 4k or higher desktop display are so hard to make. If anything I would think it would be easier than the displays they make for tablets and smartphone with crazy high resolution.

Also, why is it not extremely easy for desktop graphics cards to support 4k displays? A graphics chip in a smart phone can do 1080p why is it a struggle for desktop cards to go beyond that?

I have tried to find resources that explain this to me but I can't.

 

[maflynn]

I would assume that pixel density is hard to manufacturer in yields that decrease the over all cost. Millions of transistors means that if you have a failure in a handful of them, the panel is no good.

 

[DisMyMac]

Maybe cause big flat things warp easily, so it takes different manufacturing. Just a guess.

 

[MxDaviD]

What about seiki 4K? it is not that expensive 39" cost just 499$.