warezme :
Never understood why it is easier to put ever smaller pixels in a small screen than putting larger pixels on a larger screen. Like putting 3200 x 1800 on a 24" panel that I would buy as opposed to a 13.3" ultrabook whateverl that I wouldn't.
It is a volume issue on 2 fronts.
1) small screens take less resources to make. Not only is the panel smaller, but the machines used to make these panels are also smaller. This does not necessarily mean that they are cheaper or less complex, but when building in volume it means you can make a lot more panels per square foot in a factory, and if you end up with a bad panel then it is wasting less resources.
Larger screens require more space to make, more materials to make, and when you end up with a failed screen then it is a much larger cost that then gets pushed onto the good panels.
2) The other volume is in sales. Portable devices are still on a 2-3 year replacements for most people, which means that while yearly numbers may not be high, it is a market which will have consistent numbers every year which can be built upon. And when you buy a new portable device... you are getting a new screen every time.
Contrast that to a desktop situation where the monitor is replaced every 10-15 years. Many businesses are still running on very old 3rd gen panels (because 1st and 2nd gen panels have pretty much all died by now). Need a new computer? That is fine.... but you are going to keep your monitor in an office environment. On top of that most home users never replace their monitor because they view it as expensive... even though these are the same people who will replace their HDTV every 3-5 years.
Basically, by buying a PC monitor you are paying for the company to stay in business for the next 10 years because very few other people are going to be helping you support that company by upgrading their panels any time soon.
Personally I cant wait for 4K monitors to come to desktop in the ~40-45" range. It may be a while, and it may be a while longer until I can afford to actually get it, and longer still before a GPU can properly push it, but I just bought my current monitor 5 years ago, and I know that I want a 4K monitor, so I am not about to go blow money on a monitor now only to upgrade again in another 2-3 years... because people like me may be the problem, but we also cannot justify those kinds of costs every few years.