Windows 8 — Disappointing Usability for Both Novice & Power Users (Jakob Nielsen’s Alertbox)
The Roman god Janus; Dr. Jekyll and Mr. Hyde; even Batman’s arch-foe Two-Face — human culture is fascinated by duality. We can now add Windows 8 to this list. The product shows two faces to the user: a tablet-oriented Start screen and a PC-oriented desktop screen.
Source: www.useit.com