This morning Apple announced the latest milestone for the App Store–it’s finally broken the 100,000 app mark, making it the “largest application store in the world”. They also report that users have downloaded over two billion apps, a number which is sure to make other mobile competitors sweat a bit.

Philip Schiller, Apple’s senior VP of Worldwide Product Marketing, delivered the following celebratory quote:

The App Store, now with over 100,000 applications available, is clearly a major differentiator for millions of iPhone and iPod touch customers around the world. The iPhone SDK created the first great platform for mobile applications and our customers are loving all of the amazing apps our developers are creating.

Apple certainly deserves to revel in their victory, but they should be careful not to get too lazy. After all, both Palm’s Web OS and Google Android are still fairly young, and the app store was far from a reality at the same point in the iPhone’s life. Don’t forget that the app store only launched in July 2008, by which point the iPhone was already popular. Google in particular won’t be sitting on their laurels in the next few years.