On the Economist of today there's a good article about Windows and Linux market that I want to signal to you: More balls through Windows.
This article analizes the market of these operative systems and (apart from the results, I think that we've read it a lot of time... are always the same...) at the end it introduces a new possible scenario of this infinite "war":
But the future is uncertain, and Linux still might yet represent another kind of threat to the company. No standard operating system has yet emerged for mobile handsets, robots, watches, televisions, printers, car gadgets and other such devices. Microsoft, naturally, wants to extend Windows' dominance to these as well. It is here, rather than the desktop, that Linux could be a real threat to the mighty company's ambitions.
I agree with the author... this could be the real future scenario of competiton between Linux and Windows.