With the release of the first android based cellphone, the game has begun. I am now tempted to predict that Android will win over the next couple of years. Here is a link stating that motorola is going to invest heavily into this.
http://www.techcrunch.com/2008/09/28/motorola-building-up-350-person-android-team-nokia-also-sniffing-around/
Also considering the economic situation, Apple will face a lot of price competition from other cellphone manufactures and Android will win in this battle.