I think it may be too soon to call, but I would love to see Nokia and Windows Phone take off. I'm certainly no hater of either - I use a Lumia 920. My previous two devices were an HTC HD7 and HTC Titan.
Windows Phone marketshare has, in general, been increasing. The increase is, however, quite slow. The platform is slowly clawing to significance.
On this article specifically, I do believe that sales of Nokia's Lumia line would've been higher had Nokia been able to meet demand for the handset. Outside of America, the Lumia 920 and 820 have been plagued with availability issues. From what I understand, they were simply not capable of producing enough handsets to meet demand. Perhaps these figures were just as surprising to them?
EDIT: Also, I do believe it is significant that Nokia has become profitable. HTC is on the verge of not being profitable, as far as I'm aware.