tried the consumer preview from my side. i must admit, the idea and concept are interesting.
i look at myself as a productivity user. therefore i can't see myself using it. navigation is too complex, takes too long in too many steps.
as i work in the it industry, i don't see my company and customers using it either. microsoft will be annihilating its business customers. the education of the workforce would simply be too time consuming and expensive. also software developers would need to adapt all major applications (we operate up to 380) which they won't be able to do in time.
since the operating system itself is really, really fast and cross platform compatible i really do hope that there will be a business version featuring a classic desktop including the start menu.