What do you think of this concept Facebook design?

Earlier today, this morning to be exact, I stumbled upon a new concept Facebook design that I was really impressed with. It had everything I wanted in a future Facebook design, such as a clean simple interface, and modern looking interface as well. Everything I would ever want in a Facebook design was here. I also thought that the design must have had some inspiration from Windows 8, more specifically the modern UI, as it resembled a modern Windows 8 app.

The design was created by Fred Nerby.

My question is, what do you think of the concept? Good, or bad? Just curious.
The design can be found here: http://www.icydiablog.com/news/awesome-facebook-concept-design