An interesting concept which seems to hit the mark when I look at my current needs for home PCs and small network.
One central location to share files and store backups of all of my PCs. Let's see what this can really do.
More info at:
http://www.microsoft.com/Presspass/press/2007/jan07/01-08WindowsHomeServerPR.mspx
And for those of you involved in the Beta:
http://forums.microsoft.com/windowshomeserver/default.aspx?siteid=50 