I like how they say the monopoly wasn't overcome by regulations but rather the much more powerful market. So true. But the phone market will mature more quickly, imo, and none of the other devices can truly replace a PC.
A risk here is that MS will start to believe misleading charts like the one in the article and lump Windows in the same category as phone and tablets (Win 8). I can see why they want the money, but a real traditional desktop still has a lot of value.