Does anyone know of any studies that support the article's statement that Apple, when combining OSX and iOS, has more users than Windows now? If you ignore legacy devices still in use I could possibly, maybe, see that. Although, if you count total devices existing in the market, which the graph seems to ignore, I just can't agree with that notion.

Plus, based on the speed of innovation in this market, making predictions up to four years into the future is highly optimistic on their part.