The Asus PB248 has a maximum contrast ratio of 80000000:1. That's over four times the contrast ratio of a 20000000:1 PC display, which is the most frequently found contrast ratio. PC monitors that were launched more than two years ago dynamic contrast ratios range from Mega Contrast (worst) to 100000000:1 (best).
We think you might also be interested in some of the alternative PC screens that have an 80000000:1 dynamic contrast ratio currently available including the AOC u3477 ($599.99), the Asus PB278 ($319.99), or the Philips 272G5DJEB which has a better Rating.
If the contrast ratio of this LCD screen is not high enough for you then you might also want to consider the CB270HU (100000000:1), or the CB290C (100000000:1) both from Acer or the Asus PB287 ($344.99) (100000000:1) which also has a higher rating.