only vaguely recall hearing about longhorn... i'm guessing since Win9x/ME are 4.x versions, speculating that Win2K/XP are 5.x versions then i'd have to surmise that longhorn has some significant fundemental differences w/Win2K kernel based OSs. 1st thing that comes 2mind is 64bit? looks i'll have to do some urlsurfin 2morrow - unless u wanna spill some dirt (hint, hint!) :)
This may be an attempt at CUD by (my take on Fear/Uncertainty/Doubt, being Confusion) Microsoft, but ironically here's another link - http://www.zolknetwork.com/forum/showthread.php?s=&threadid=3270 - from the same site aeinstein linked to. It seems as interesting as the screenshots appear, they may be somewhat premature - although I think they're still interesting captures.