I thought I'd reply to this, because it's something which greatly surprised me the first time I noticed it: I have a damn nice iiyama HM903DT 19 inch CRT, and a pretty cheap Samsung 710N TN-panel LCD screen running dual screen right next to each other. Now TN panels are not very good technology, particularly not good at deep blacks, the Samsung doesn't even have DVI, etc.... However, that's not the point I want to make.
In the evenings, the blacks on the LCD look vaguely grey. It's depressing to watch the nice deep blacks on the CRT and how much worse they are on the LCD. So if you are a night-time user, a CRT is better.
However (and this is the big thing), everything is different during the day. When there is full ambient daylight, the same tests show that the CRT, with its phosphoric layer, is far less deep black than my not-particularly-good LCD.
Things get better for LCD when you switch to VA panels, such as the one in the Dell 24 inch. So if you are mostly a daytime LCD user, you actually end up with a much better result than CRT people.
For this reason, many many people are switching over, particularly when Dell is pratically giving away the 20+ inch screens at prices which look absurd compared to what you could buy for the money last year. Hence the need to cater to native LCD resolutions like 1680x1050 (20 inch widescreens) and 1920x1280 (23/24 inch widescreens).
Hope that has cleared things up