The best possible move MS could have made while still wanting to leap into the mobile market fire would have been to develop a variation of 8 for touchscreen and more versatile to mobile application while still maintaining an updated desktop OS people could live with! Instead they simply jam Metro at everybody saying "this is the way it will be! Too bad if you don't like it! You still will need a new Windows some time! We'll still get you!"
You are right... Vista was nowhere near as bad as the press made it out to be! However, the press is a powerful sales tool... Vista gained few adoptions/upgrades from XP because of this. Most Vista users got it on a new PC!
I also agree that a Metro UI is being rammed down our throats, this UI is cumbersome for anyone like me who has used Windows for over 20 years! I think in the end MS will see the error of their focus groups and the associated telemetry, sales will be dismal, and Win8 will gain a "START" button and menu like its older siblings. MS Leave Metro, but give us our old START button, menus and a way to shut off metro on the devices we wish to.
I predict Apple will gain 10% market share in installed OS by end of 2013 thanks to Win8 (currently at approx 6%)! MS cannot simply cram this in our faces, we will revolt at the cash register! Even the low price shows how nervous MS must be with this new OS and it's Metro-sexual interface... :0