The 30 June is the 15th anniversary of the iPhone being on-sale (as opposed to announced). The launch of the iPhone - as much as the launch of the iPod - put Apple on the path to be the monster (sized) company it is today. Its >50% margin and high volume sales created massive profit that continued to grow at high rates for 10 or more years. It also laid the foundation for the iPad, one of the largest computing platforms available today (the iPad - at least initially - was essentially a large-screed iPhone at a price - at launch - that was viewed as great value). With the launch of iOS 2 the app store was ‘bolted on’ to iTunes unleashing a services profitability wave that was further expanded in iOS 3 to all the media types available today (more or less) and additional paid services to the present.
And while the iPhone is broadly stable in sales today (it appears to increase & decrease in update waves superimposed on a slowly growing base) it still spins-out vast profits for Apple to utilize moving forward. The ultimate ‘cash cow’.