BUT, for me the Metro-style is to use only limited. I work every day from 5 to 8 hours on desktop PC. For me, the Metro UI is more grauselich. Many features that were in previous versions to achieve (good for me) on the respective menu bars are now well hidden. Needs to get to the things you first get a latte on shortcuts by heart, etc.
This Windows should have come in two versions. Once pure Metro UI and even with the classic UI that Microsoft would probably save a lot of hassles. So although it is to use for everyone, but you have here things together that do not belong together. Had Microsoft a carmaker would be the thing now probably a convertible truck. However, everybody can choose what he wants (Metro / Classic), so what the heck, it remains the purely technical advantages, as well as faster start, etc.
If Microsoft but sometime in coming versions the Classic UI banish completely, then I would have so many connect a previous speaker and say, "not to be used for professional users". Then productivity would be forced to "Ipad level".
Technically Win 8 is probably relatively mature, but the two operating concepts do not mix. Here probably had the manager the scepter in his hand, the attempt to create a panacea, however, failed thoroughly. I imagine this "important" manager before calling for new talks in silly without departing from the old, then something comes out here - the symbiosis of failed tablet and desktop. There is a reason why there are tablets and desktops, there are simply two different things.
Either way, you can win 8 buy quiet, but if you expect great you will be disappointed. If you are a dedicated professional, the Metro UI is probably not for you if you just want to surf and play already. As long as both concepts can coexist so everyone get along, but if you in between jumps back and forth (which can not be avoided 100%) is pushing the idea: to "silly thing" probably forcibly. Otherwise, "all that bad", just new and with the possibility to do it anyway different in Classic Style.