Addressing a few random issues that have been brought up.
* Nothing is 'wrong' with the macbook screen. Its really nice, actually, and I don't mind the glossy one bit! I'm just a pixel whore, and don't mind a higher DPI. Stock DPI is about 114, and a 1440x900 would push it to 129, which isn't unreasonable for someone who likes screen real estate, and has young eyes.
* Screens ARE sold at 129 stock (any 15.4" screen at 1680x1050 is 131 dpi), and if people complain, its not enough of them to prevent them from being sold, so I don't buy that argument for why you can't find 13.3" screens at ~130dpi. Its probably just that it is a new/uncommon size.
*I see gamut as a bigger problem than resolution for display of realistic images on screen. If I take my glasses off (blurring the pixels and removing the need for higher resolution), I can still tell that the image on my screen isn't a real photo. In fact, no three-color emissive display can create the full color range that we can see. Its going to take a fundamental change in technology to make that happen.
*The "idea" when selling displays is to keep a consistent DPI for the screen size. When shopping for screens, you are looking for two things, DPI (how grainy it is/how small widgets are) and size (how my screen realestate you have). I like between 110 and 130 DPI, so I'd buy the biggest monitor I could afford that hits those DPIs.
Why does Dell sell a 22" at the same resolution as their 20"? Two reasons.
Some people prefer a lower DPI so the larger screen gives them the same amount of work space, but the widgets are all a little bigger and blurrier.
But the REAL reason is because most consumers don't think about things like this, so they just buy the biggest monitor they can afford. Which is why you can purchase junk like 1024x768 20" monitors. Bigger = Better, right? The distinction between size, resolution, and resultant DPI isn't something people think much about, so manufacturers can make cheaper displays and sell them for more.
peace,
sam