HD / Blu Ray laptops & PC's - Whats the quality like?

I’m looking for a laptop upgrade in the next few months and was wondering if anyone has seen / used the new Sony HD / Blu Ray laptops first hand.

I’m not that interested in the built in Blu Ray drive, more what the HD screen looks like within a windows environment. Do XP / Vista icons, menus etc appear in true HD, are things more prominent or does it make no difference at all?

I’ve seen the VAIO laptops on a demo, the Xbrite screen is much nicer compared to the others. The resolution is 1920x1200 vs the other is 1440x900 so there’s quite a difference especially when playing (hidef) movies.