Originally posted by hvfsl
The bit rate is how many colours the display can show, 16.7million colours is the most number of colours the human eye can see.
Bit RATE?! There is no rate involved in monitor bit DEPTH.
24it and 32bit colour displays are both capible of displaying 16.7million colours, although I am not sure what the extra 8bits is used for on the 32bit displays is used for.
You cannot set any monitor to a higher bit depth than 24 (millions of colours). 16 bit is thousands of colours, 8 bit is 256 colours, 4 bit is 16 colours, 1 bit is black and white.
An IMAGE file can have more than 8-bits per channel (so more than 24 in total): e.g. a scan from a 16-Bit per channel scanner is a 48-Bit file. Also, you can have other channels than colour in an image, e.g. an alpha channel (for transparency)- usualy an additional 8 bits, making a 32 bit image. (this has nothing to do with monitors, by the way)
In the end it all comes down to looks, if you like the quality of the monitor, then get it. But I have to say Apple displays are generally better than PC ones, I have always got a Mac laptop because of this even though I use PC desktops.
Dell (for example) has some very high pixel density laptop screens (1600x1200 in a 14"). I wouldn't say that Apple's lkaptop screens are any better, when you compare with Sony/Toshiba/etc high end models.
Apple's screens are good for the Mac OS which can't adapt as much to changing pixel densities.
Having a 15" laptop with a wide aspect ratio is quite unusal, and the 17" is so much better as a portable that the other behemoths on the PC size with a screen that big.
To work out the pixel density (should be fairly obvious, no?), find out the height/width of the screen- you could use trigonometry with the ratio of the sides and the diagonal distance (which is how screens are measured). Then divide the resolution in the corresponding direction by the distance in inches along a side, to give how many pixels per inch.