Time does surely fly, it seems like only yesterday that Apple unveiled the iPhone App Store to the world. The exact date was July 10th, 2008. At its launch the App Store had 500 applications, which seemed like so many at the time. Today there are millions of applications.
It is very likely that without the App Store, Apple would not be the company the it is today. It is not to say that the iPhone itself would not have been somewhat of a success, but it is without a doubt that the ability for third-parties to provide applications for users to download.
There are many things that have been said about the App Store, be sure to check out Apple’s coverage from many who have been instrumental in the success of the App Store.
Source: Apple Newsroom