46% of consumers preferring Windows = 46% of consumers who are clueless to what a tablet really is.
I've had a touchscreen LCD hooked up to my Windows 7 machine for about a year and a half. Beyond scrolling through web pages it is unusable. The Windows UI is designed for a keyboard and mouse. Now take this 22" touch screen I have and bring it down to 7". Good luck doing anything.
Obviously Microsoft's answer to this is the new Metro overlay (or whatever they are calling it for Windows 8.) If consumers are swiping through two different versions with a Windows 8 tablet, and one of them is barely usable on a touch screen, its going to flop.
I use Windows on my iPad -- by remoting in to my desktops. The only app that I have found usable is LogMeIn because of how the mouse cursor is controlled. Its not a pleasant experience but I can get minor work done at able 1/4th speed or less. You can't release a device that does that out of the box and put your brand on it.
Microsoft appears at a loss on how to move from the keyboard & mouse world to the touchscreen & voice one. Windows has tons of software for it, none of which was designed for touchscreen & voice world. I never have used this phrase before, but Microsoft is trying to have their cake and eat it too. Instead they will get nothing.