For me, Windows 8 is a huge no-go. It will fail as a Desktop OS, and it will fail as a Tablet OS.
I think you're wrong there. Win8 will succeed because it's a step towards greater control over the user with less privacy. These are things that are being forced on us, and you will see glowing reviews for Win8 from everywhere.
So while your computing experience deteriorates, and you lose your privacy, the corporate goons that profit off of you as "you are the product" - they will laugh all the way to the bank. Oh, did I mention that there is new legislation that encourages companies to spy on their customers and report "terrorists"? Yeah - Win8 will help there, but it won't help you.
And that's why Win8 will succeed - because it's bad for you and good for your slave overlords.