If you don't like it, don't use 'em.
1. Business will not deploy it
2. Only tablet or touch screen use in the consumer market
Why? Business will lockout the "Metro" interface, and just load the "desktop app" - at processor & memory cost - which in an Enterprise = lotsa $$
The consumer who still thinks of a PC a a traditional Windows desktop w/ traditional menus and apps will be turned off, because their new shiny toy will get crap performance w/o TONs of memory and horsepower. Because they'll want a desktop.
Dedicated OS's for dedicated devices guys - it just works better. less code = more harmony.
The optimum committee has no members. -- Norman Augustine