Android is clearly the winner here as far as marketshare, but apple is king when profits are concerned.
Figure the number a few years from now. Nokia continues to lose share, its MeeGo OS is going to be a failure in the smartphone arena. BB will continue to have corporate customers, but will continue to lose the consumer market. Andoid (with dozens of vendors) will continue to rise. Apple will diversify to different carriers, but will stagnate in the overall marketshare arena.
Is this a problem? Probably not. Apple makes money on every stage of the game... hardware, wireless / data revenue, iTunes, App Store, licensing "made for iPhone", accessories, iAds, etc. Google currently gives its OS away... in the future they may charge for it, but even then it is a once only sale. Sure, they make money in search and ads, but they have nowhere near the revenue stream of the iPhone ecosystem.
So apple has a future of 15-20% of the market. Great. They will continue to make money hand over fist, continue to please their shareholders, and continue to innovate and bring new products to market. Google will do great, but they will not make anywhere near the revenue from Android that apple will.
MS hopefully will make some headway with WM7... I'd hate to only have 2 viable OS choices in the mobile platform.