I’d say the issue was really with colour accuracy rather than the finer points of the display. On the Mac, colour management and the use of profiles is totally integrated at the system level, but on a PC (even under Windows XP) you need to tell the OS what monitor profile to use and then you’re still not sure what Gamma you’re working under etc etc.
The bottom line is that Macs are much better working with video/graphics than a PC. The current Apple laptop isplays are still considered to some of the best, not that I’ve seen the X-black screen.
Note to mention all the other ‘issues’ you’ll have with Windows.