From microsoft:
Windows Home Server features at a glance
    * Your family's digital memories and media organized in one central hub
    * Home PCs backed up daily, automatically
    * Simple recovery of lost files or even entire PCs
    * Complete access from networked PCs to all your Windows Home Server files
    * A personalized Web address for sharing your photos and home videos
    * Easy and quick setup
    * Expandable storage space for future use
    * Innovative third-party applications
Sharing:
The major issue is all family members can access photos, videos, movies and documents library any time anywhere around the home. 
Standardize the applications like office and photoshop.
