Different stats and market research all point to the same conclusion: that the mobile market is being reduced to a two-horse race between iOS and Android (or Apple and Samsung, specifically) as once great incumbents such as RIM and Nokia get pushed aside, their market shares seriously declining.
In fact, it's fairly safe to say that on the fifth anniversary of iPhone, both RIM and Nokia are fighting for survival, quite possibly their lifecycle coming to an end. Meanwhile, only four companies are turning profit in the increasingly crowded smartphone space...