I like Paul Thurrott's take on Windows 8:
Windows 8, Metro, and Mobile Apps - www.winsupersite.com
“Windows 8 is a new mobile operating system and not an evolution of the previous Windows codebase. Yes, an evolution of that previous codebase is present, complete with an improved desktop environment.”
“This is the single biggest change that’s ever happened to Windows -- and yes, I’m including NT in that assessment”