I must give it to Apple for coming up with the iPhone. Because of iPhone, the PDA market becomes active with so many device trying to become the next iPhone or at least keep up with the popularity of iPhone. With the innovation of Apple to come up with App Store, it become obvious that people love it and are buying software from it. Now, in record time, Apple App Store has managed to hit the one billion mark.
The idea of different websites downloading different programs become a thing of the past. Everyone is talking about App Store.
Now, Google Android, Microsoft Windows Mobiles, BlackBerry, Symbian, WebOS are all trying their best to have a Marketplace or something like that to keep up with the lucrative business. Hope that all can do well as it will only benefit the users. 
(source)
