Are you willing and able to offer someone INCREDIBALE rewards? Just what would those be? Or can you merely just make empty promises? What makes you smarter, better, more awesome than the many other dudes out there who think they can take down Facebook, iTunes, and Amazon? I'm assuming Google is in your cross hairs too. I trust that you will work hard - but so will a LOT of your competitors. What makes you different?
No, Microsoft is not king to kill/neglect/break it. Ubuntu does not scare us one little teeny tiny little bit. Linux desktop client is just a non-starter, still, after years and years of effort. Yes, you can use it. But its not anywhere near ready for several hundred million users. The only ohter credible desktop OS besides Windows is OSX.