Earlier quoted context omitted.
Their history with Windows is not an advantage if the design of it is cumbersome and full of compromises. Which, more than anything, is what the point of the article is getting at. Microsoft has had a decade of chances in this market to pull off the "business tablet" market you're suggesting. And, well, they just haven't done it yet. If this is such a competitive advantage, why wasn't the iPad put on a Mac OSX archit…
You could have made the same argument in 1989 about MSFT attempting to graft a GUI on top of the PC and DOS, though. They tried it a couple times with Windows 1 and 2 and largely failed, meanwhile Apple made a fresh start with the Mac and has been exciting everyone for five years, clearly MSFT's approach is inherently doomed to failure and they should either develop a brand-new HW/SW system from scratch or give up on…
It's not clear what "version 3" of MS's tablet strategy really is, or whether their product-development effort has reached that level yet. But if history is any guide, we'll know it when they ship it. Most likely, it will happen around the same time that Apple's proprietary, grasping nature starts to become self-defeating.