I plan on sticking with Win7. The point you are missing is that many people LIKE the standard Windows set-up. We don't see a reason for it to change, especially just to pander to a small segment of the market (tablets). Guess what, tablets are great for watching YouTube and updating Facebook, and suck for just about anything else.
Microsoft has remained dominant because it takes care of corporate customers. The new UI is going to mess this up for them. I suspect a few months after release, a number of managers are going to be fired and the UI will at least have the option of the Win7 style, if it isn't just changed to it outright.