It's going to be hard for Tizen to catch up this late in the game. Android and iOS are currently dominating the marketplace. Tizen should have some unique features that will make it appeaing to consumers, otherwise it will end up dead on arrival.
Tizen will WIN, Windows Phone will remain a small player and Firefox will also remain small. But it would be very hard to get Android down from the top. I got some articles from http://www.whatistizen.com. They publishing articles only about tizen OS.